helpp!! solve the system of equations using substitution

3x + 2y = 7
x = 3y + 6

1. ( 0, -2 )
2. ( 1, 2 )
3. ( 3, -1 )
4. ( 6, 0 )

Answer:

it's going to be 7.4

Step-by-step explanation:

5 x 4 = 20

4 / 2 since you want to get radius

2 x 2 = 4 x pi for both half circles.

4 x pi = 12.5 --> 13

20 - 12.5663706 = 7.43 ---> 7.4

Lily took a certain number, multiplied it by 3, and then subtracted 8 from the product, which resulted in 7. The initial number was 5.

The equation that describes this situation is: 3k - 8 = 7.

To solve for k, we can isolate the variable by adding 8 to both the sides of the equation:

3k - 8 + 8 = 7 + 8

3k = 15

Finally, we can solve for k by dividing both sides of the equation by 3:

k = 5

Therefore, Lily started with the number 5, tripled it to get 15, and then subtracted 8 to get an answer of 7.

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The οnly sοlutiοn is sinθ = 0, θ = kπ, where k is any integer.

Trigοnοmetric functiοns are mathematical functiοns that relate tο the angles and sides οf a right-angled triangle.  These functiοns can be used tο calculate the relatiοnships between the sides and angles οf a triangle.

1a) Using inverse tangent functiοn,

θ = tan^{-1}(-2/3) ≈ -0.93 + kπ οr 2.21 + kπ, where k is any integer.

1b) Using cοsine functiοn,

[tex]2cos^{2}\theta - 1 = 0[/tex]

[tex]cos^{2}\theta= 1/2[/tex]

cοsθ = ±√(1/2) = ±1/√2

Sο, θ = π/4 + kπ/2 οr 3π/4 + kπ/2, where k is any integer.

1c) Rearranging the equatiοn, we get

[tex]sin^{2}\theta - 6sin\theta- 7 = 0[/tex]

Using the quadratic fοrmula,

sinθ = [6 ± √(36 + 28)]/2 = 3 ± √19

Since -1 ≤ sinθ ≤ 1, the οnly sοlutiοn is

sinθ = 3 - √19

[tex]θ = sin^{(-1)(3 - \sqrt{19})} \approx 0.47 + 2k\pi[/tex] οr π - 0.47 + 2kπ, where k is any integer.

1d) Factοring οut sinθ frοm the equatiοn, we get

sinθ(cοsθ - 7) = 0

Sο, either sinθ = 0 οr cοsθ = 7. Since -1 ≤ sinθ, cοsθ ≤ 1, the οnly sοlutiοn is

cοsθ = 7 has nο real sοlutiοn, sο the οnly sοlutiοn is

sinθ = 0

θ = kπ, where k is any integer.

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Answer: range

Step-by-step explanation:      

The marked point on the given graph of a quadratic function shows the minimum, vertex and zero but not the solution of the function.

All degree two quadratic functions have a parabola as their graph. Quadratic functions can be expressed in three different ways: standard form, factored form, with vertex form.

Now,

Then, the marked point on the given graph of a quadratic function shows the minimum, vertex and zero but not the solution of the function.

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The probability mass function (pmf) of the random variable x is:

Question 1: The chance a 1-km segment of railroad track contains a defect is 0.01. Assume the 1-km segments of track are independent. a. Compute the probability that exactly 125 km of track need to be tested before a defect is found. b. On average, how many 1-km segments of railroad track have to be tested before a defect is found?

Answer 1: a. The probability that exactly 125 km of track need to be tested before a defect is found is 0.000148. b. On average, 125.01 1-km segments of railroad track need to be tested before a defect is found.

Question 2: A geotechnical engineering company conducted a study that indicates there is a 20% chance a borehole in a certain neighborhood will find a layer of clay no more than 20 m deep. a. Compute the probability that the third layer of clay within 20 m is found on the seventh borehole drilled. b. Compute the mean and variance of the number of boreholes that must be drilled if the geotechnical engineering company wants to have three that find clay within 20 m.

Answer 2: a. The probability that the third layer of clay within 20 m is found on the seventh borehole drilled is 0.02. b. The mean and variance of the number of boreholes that must be drilled if the geotechnical engineering company wants to have three that find clay within 20 m are 15 and 75 respectively.

Question 3: Dam failures are rare and are estimated to occur on average once every five years. a. Compute the probability there will be at least one dam failure in the next 10 years. b. Draw a pmf that describes the random variable x.

Answer 3: a. The probability that there will be at least one dam failure in the next 10 years is 0.8187. b. The probability mass function (pmf) of the random variable x is:

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The probability of waiting longer than one hour for a taxi is approximately 0.5488

Let X be the time between arrivals of taxis at the intersection. Then, X follows an exponential distribution with a mean of 10 minutes, i.e., E(X) = 10.

We want to find the probability of waiting longer than one hour (i.e., 60 minutes) for a taxi. Let Y be the waiting time for a taxi. Then, Y = kX, where k is a constant.

We can find k as follows

E(Y) = E(kX) = kE(X) = 10k

Since the mean waiting time is one hour (i.e., 60 minutes), we have

E(Y) = 60 minutes = 1 hour

Therefore, we get

10k = 1

k = 1/10

Now we can find the probability of waiting longer than one hour for a taxi as follows

P(Y > 60) = P(kX > 60) = P(X > 6) [since k = 1/10]

where the last step follows from the fact that X follows an exponential distribution with mean 10, so P(X > x) = e^(-x/10) for any x > 0.

Therefore, we get

P(Y > 60) = P(X > 6) = e^(-6/10) = e^(-0.6) ≈ 0.5488

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The given question is incomplete, the complete question is:

The time between arrivals of taxis at a busy intersection is exponentially distributed with a mean of 10 minutes. (a) What is the probability that you wait longer than one hour for a taxi?

The margin of error with a sample size of 1600 will be smaller than the margin of error with a sample size of 100, assuming the same standard deviation and confidence level, meaning that we can be more confident in the accuracy of the estimate with a larger sample size.

Assuming that both samples have the same standard deviation, the margin of error for a 95% confidence interval for estimating a population mean can be calculated as

Margin of Error = z×(standard deviation/sqrt(sample size))

where z is the z-score corresponding to the desired confidence level (in this case, 1.96 for a 95% confidence level).

For a sample size of 100, the margin of error would be

Margin of Error (n=100) = 1.96×(standard deviation/sqrt(100))

For a sample size of 1600, the margin of error would be

Margin of Error (n=1600) = 1.96*(standard deviation/sqrt(1600))

Since the standard deviation is the same for both samples, the only difference between the two margins of error is the sample size. The margin of error is inversely proportional to the square root of the sample size, so as the sample size increases, the margin of error decreases.

In other words, the margin of error with a sample size of 1600 will be smaller than the margin of error with a sample size of 100, assuming the same standard deviation and confidence level. This means that we can be more confident in the accuracy of the estimate with a larger sample size.

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The property that justifies that action - A. Action: Add 3 to both sides, D. Property: Addition property of equality.

The addition property of equality is a fundamental property of algebra which states that if the same value is added to both sides of an equation, the equality is still maintained. In other words, if a = b, then a + c = b + c for any value of c. This property is useful when we want to isolate a variable on one side of an equation, by adding or subtracting the same value from both sides until the variable is isolated.

To solve x - 3 = 12, we can use the addition property of equality, which says that if we add the same value to both sides of an equation, the two sides remain equal.

Starting with x - 3 = 12, we can add 3 to both sides to isolate the variable x:

x - 3 + 3 = 12 + 3

x = 15

Therefore, the solution to the equation x - 3 = 12 is x = 15.

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The total area that Leo plans to cover with gold leaf is 4*30.95 = 123.8 ft2. Leo plans to cover 61% of the area of the stand with gold leaf.

A right trapezoidal prism is a three-dimensional solid with two parallel trapezoidal bases and rectangular lateral sides. The trapezoidal prism's bases are not perpendicular to its lateral sides, but rather slanted. A right trapezoidal prism is referred to as "right" if its lateral edges are perpendicular to its bases.

(a) Area of trapezoid = (a + b)/2 * h = 40

9a + 9b = 80

a + b = 80/9

Now, let the height of the trapezoid be h1, and the length of the shorter side be h2. Then we have:

[tex]h1^2 = (9/2)^2 + h2^2[/tex]

h2 = [tex]\sqrt{(h1^2 - (9/2)^2)}[/tex]

Finally, we can find the perimeter P of the base by adding up the lengths of all four sides:

P = a + b + 2*[tex]\sqrt{((a-b)/2)^2 + h2^2)}[/tex]

Now we can find the length of roping needed:

Length of roping = 4P = 4(a + b + 2*[tex]\sqrt{((a-b)/2)^2 + h2^2}[/tex])

Substituting a + b = 80/9 and h2 from above, we get:

Length of roping = 4(80/9 + 2[tex]\sqrt{((a-b)/2)^2}[/tex] + [tex]\sqrt{(h1^2 - (9/2)^2))}[/tex]

Length of roping = (320/9) + 8[tex]\sqrt{((a-b)/2)^2}[/tex] + 4*[tex]\sqrt{(h1^2 - (9/2)^2)}[/tex]

Length of roping = 37.14 ft

Therefore, Leo purchases 37.14 feet of roping.

(b) The total surface area of the stand is 203.8 [tex]ft^2[/tex]. The area of both bases combined is 2*40 = 80 [tex]ft^2[/tex]. Therefore, the area of the sides of the stand is:

203.8 - 80 = 123.8 [tex]ft^2[/tex]

The stand has four side faces, so the area of one face is:

123.8 / 4 = 30.95 [tex]ft^2[/tex]

The total area that Leo plans to cover with gold leaf is the sum of the areas of all four side faces, which is:

4*30.95 = 123.8 [tex]ft^2[/tex]

Therefore, the percent of the area of the stand that will have gold leaf is:

(123.8 / 203.8) * 100 = 60.73%

Rounding to the nearest whole number, Leo plans to cover 61% of the area of the stand with gold leaf.

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The expression into non zero and non negative exponents are:

1) 1/7   (2) 1    (3)1/0.0000001    (4)5     (5) 0    (6) 4x³        (7) 4/5x⁶   (8)10a⁷b⁶/c⁷       (9) 1/y⁵z²      (10) 100    (11) 9/ab         (12) 9x²       (13) 14a⁴/b    (14) a⁵ⁿ       (15) 32

1) 7⁻¹ = 1/7

       = 0.143

2) (14abc)⁰ = 1

3) 10⁻⁹ = 1/10⁹ = 1/0.0000001

4) 5(xy)⁰ = 5(1) = 5

5) 0¹⁵= 0

All numbers beginning with 0 are 0.

6)   [tex]\frac{24x^{8} y^{4} }{6x^{5} y^{5} }[/tex] = 4x³

7) [tex]\frac{1}{5y^-1}[/tex]

8) [tex]\frac{10a^7b^{10} }{c^7}[/tex]

9) [tex]y^-5z^-2[/tex]

10) {(5xy)⁸/10}⁻² = (1/10)⁻² = 100

11) {(ab)/9)⁻¹ = 9/ab

12) 9/x⁻² = 9x²

13) 12b⁻¹/a⁻⁴ =12a⁴/b

14) 1/5⁻⁵ᵃ = a⁵n

15) (1/2)⁻⁵ = 32

Positive exponents indicate that the base should be multiplied by that amount.

For example, if the number is 10³, 10 must be multiplied by 10 10 10, which is 1000. If the variable is x⁹, then x must be multiplied by itself nine times:

Positive effect: If f(x) = ax for a positive real number a, then f(x) > 0 for each x. In other words, f(x) is always positive regardless of the value of x.

Understand that an exponent is the number of times a number is multiplied by itself. For example, 3² is equal to 3.3. In the case of a positive exponent, the number (the base) is multiplied by itself, while in the case of a negative exponent, the reciprocal of the number is multiplied by itself.

For example, 3⁻² = 1/3 1/3.

A positive exponent indicates the number of times to multiply the base number, and a negative exponent indicates the number of times to divide the base number. Negative exponents can be rewritten as 1/xⁿ. Example: 2⁻⁴ = 1 / (2⁴), or 1/16. The zero exponent rule states that any base with an exponent of zero equals one.

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The probability that a card drawn randomly from a standard deck of 52 cards is a red queen = 0.038

We know that the formula for the probability of an event is given by,

P = number of favourable outcomes / total number of possible outcomes of an event

Let us assume that event A : drawing a red queen card

Here, sample space is a standard deck of 52 cards.

So, n(S) = 52

We know that there are 2 queens of red color (red heart and red diamond)

So, n(A) = 2

Using probability formula,

P(A) = n(A) / n(S)

P(A) = 2/52

P(A) =  0.038

Therefore, the required probability is 0.038

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The statements B, D and E can be used to justify that the function is linear.

A function is the central idea of calculus in mathematics. Certain types of functions are the relations. A function in mathematics is a rule that generates a different output for each input x. A mapping or transformation in mathematics serves as the representation of a function. Several people use letters like f, g, and h to denote these operations.

Here in the question,

Given equation is y = 2x - 5

Now we know that the general form of a equation is y = mx + c

So, y = 2x - 5 is a linear equation as it is in the slope equation form.

Now, from the equation,

Slope, m = 2.

Graph of the function is a straight line.

Therefore, we can say that the equation is a linear equation as it has a slope, m=2. The graph is a straight line, and the equation is in the form of y = mx+c.

Hence, the statements B, D and E can be used to justify that the function is linear.

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The complete question is:

Consider the function defined by

y x = − 2 5.

Which statements can be used to justify that the function is linear?

Select all that apply.

A The coefficient of x is greater than 1.

B The function has a constant slope of 2.

C The function has a negative y –intercept.

D The graph of the function is a straight line.

E The equation is written in the form y mx b = +.

PLS HELP ASAP!

The distance that a person travels when the Ferris wheel rotates through an angle of 4.25 radians is 161.5 feet.

Given,The distance from the center of a Ferris wheel to a person who is riding is 38 feet.To find the distance that a person travels when the Ferris wheel rotates through an angle of 4.25 radians. Formula used:When an object travels on the circular path with the radius 'r' then the distance it travels is given by `s=rθ`.Where `s` is the distance, `r` is the radius and `θ` is the angle traveled by the object.So, the distance that a person travels when the Ferris wheel rotates through an angle of 4.25 radians is given by s= 38 x 4.25=161.5 feet.Hence, the distance that a person travels when the Ferris wheel rotates through an angle of 4.25 radians is 161.5 feet.

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The calculated value of the lateral area of the rectangular prism is 272 cm².

We know that the surface area of the rectangular prism is 392 cm², and the area of the base is 60 cm².

The base area is the same as the top area

Therefore, the sum of the areas of the four sides of the rectangular prism is:

392 cm² - 2 * 60 cm² = 272 cm²

The lateral area of a rectangular prism is the sum of the areas of the four sides, excluding the top and bottom faces.

Therefore, the value of the lateral area of the rectangular prism is 272 cm².

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Answer:

A **cone** and a **cylinder** each have 1 curved face.

The IBM computer can compute about 6 trillion (6 x 1012) multiplications per second

The IBM computer can perform around 6 trillion multiplications per second, making it one of the fastest computers in the world. Multiplication is a fundamental arithmetic operation that is used to calculate the total value when two or more numbers are combined.

Multiplication is used to calculate the total number of things when there are several equal groups. For example, 2 x 5 = 10 means that there are 10 items in two groups, each containing five items. The symbol "x" represents the multiplication operation.

The IBM computer can compute about 6 trillion (6 x 1012) multiplications per second. IBM's Summit computer, which is currently the world's most powerful computer, has a peak speed of 200 petaflops, or 200 quadrillion (2 x 1017) calculations per second. This makes it one of the fastest computers in the world.

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This graph is position-time graph.

The initial displacement οf the weight is 40cm

The weight first returns tο equilibrium when t = 1/2

In computer science and mathematics, a graph is a collection of vertices (also known as nodes or points) connected by edges (also known as links or lines).

Based on the given Graph, we can say that the graph represents a position-time graph of a weight attached to a spring.

The initial position of the weight is 40cm as given in tha graph,

We can determine the time at which the weight first reaches equilibrium.

Equilibrium occurs when the weight is at rest and has zero velocity.

This corresponds to the position of the weight being zero, i.e., p(t) = 1/2 cm. The problem states that we say the weight is at equilibrium when p(t) = 1/2 cm.

Therefore, the weight first reaches equilibrium at the time t when p(t) = 1/2 cm.

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Complete question:

The weight is initially positioned at a certain distance in centimeters, which is not stated in the query. To ascertain this number, we would need to examine the graph or receive additional information.

Based on the information given, we can say the following:

The graph of the function is a function, which means that each input (time value) corresponds to exactly one output (position value).

The initial position of the weight is some number of centimeters, which is not specified in the question. We would need to look at the graph or be given more information to determine this value.

The weight first reaches equilibrium when the position is 0 cm, which means that the function value is 0. We can find the time(s) when this occurs by solving the equation p(t) = 0.

For example, if the equation is  [tex]p(t) = 3sin(2t) - 2, we can set 3sin(2t) - 2 = 0[/tex]   and solve for   [tex]t: 3sin(2t) = 2, sin(2t) = 2/3, 2t = sin^-1(2/3) + 2πn or π - sin^-1(2/3) + 2πn[/tex] for some integer  [tex]n, t = (sin^-1(2/3) + 2πn)/2 or (π - sin^-1(2/3) + 2πn)/2[/tex]  For some integer n.

The initial position of the weight is its position when t = 0 s, which means we need to look at the value of p(0). Again, this value is not given in the question.

Therefore, Without more information or a graph of the function, we cannot provide specific values for these unknowns.

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The given question is incomplete. The complete question is given below:

The function (p(t)) gives the position of the weight at time (t). Please complete the following sentences based on the graph of the function. The graph is a function. The initial position of the weight is __________ centimeters. The weight first reaches equilibrium when t equals __________ second(s). Note: We say that the weight is at equilibrium whenever p(t) = 0 cm, and we say that the initial position of the block is its position when t = 0 seconds.

The correct answer is A. I., II., V.   I. The graph contains the point (0, 1), II.The graph falls from left to right., V. The domain is (-∞o, co), and the range is (0,00).

What is a graph?

In computer science and mathematics, a graph is a collection of vertices (also known as nodes or points) connected by edges (also known as links or lines).

The given function g(x) = (1/3)x is a linear function, not an exponential function. Therefore, none of the observations related to exponential functions apply to this function.

However, we can make some observations about the graph of this linear function:

1. The graph contains the point (0,1): This is true, as g(0) = (1/3)0 = 0, and the y-intercept of the graph is at (0,1).

2. The graph falls from left to right: This is true, as the slope of the line is positive (1/3), and as x increases, y increases at a slower rate.

3. The graph rises from left to right: This is false, as the slope of the line is positive and y increases as x increases.

4. The graph touches the x-axis: This is false, as the y-intercept of the graph is at (0,1), which is above the x-axis.

5. The domain is (-∞, ∞), and the range is (-∞, ∞): This is true, as the function is defined for all real numbers and can take on any real value.

6. The domain is (-∞, 0), and the range is (-∞, 0): This is false, as the function is defined for all real numbers and can take on positive values as well.

Therefore, the correct answer is A. I., II., V.

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Answer:

1.34453781513

Step-by-step explanation:

[tex]\frac{8}{5.95} =1.34453781513[/tex],

1. The base of the trapezoid is a rectangle, thus its area is 96 sq. units. 2. The volume of the trapezoid prism is 312 cubic units. 2. We cannot draw different triangle with same condition.

A trapezoidal prism's volume determines its capacity. It is also known as the area contained by a trapezoidal prism. The top and bottom faces of a prism have cogruent polygons, and its bases are the same. The lateral faces, or side faces, of a prism are parallelograms. The forms of the two identical faces at a prism's end can be used to identify it. A three-dimensional solid with two trapezoid/trapezium bases at the bottom and top is called a trapezoidal prism. A trapezoidal prism's lateral faces and side faces have a parallelogram form.

1. The base of the trapezoid is a rectangle, thus its area is given as:

A = lw

A = (8)(12) = 96 sq. units.

2. The volume of the trapezoid prism is given as:

V = 1/2(a + b) h(l)

Here, a = 5, b = 8, h = 4, and l = 12.

Substituting the values we have:

V = 1/2(5 + 8)(4)(12)

V = 24(13)

V = 312 cubic units.

2. The triangles with the conditions, 50° angle, a 40° angle, and a side of length 4 cm has the third angle as 90 degrees according to the internal angle of triangle theorem.

Also, the sides corresponding to the triangle remain same, and hence we cannot draw different triangle with same condition.

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The largest possible value of f(8) is 34.

The problem asks us to find the largest possible value of f(8), where f is a function that is continuous on the closed interval [4,8] and differentiable on the open interval (4,8), and satisfies the conditions f(4) = -6 and f'(x) ≤ 10 for all x in (4,8).

To find the largest possible value of f(8), we need to use the Mean Value Theorem (MVT), which is a theorem in calculus that relates the values of a differentiable function at the endpoints of an interval to the values of its derivative at some point in the interior of the interval.

The MVT states that if f is a function that is continuous on the closed interval [a,b] and differentiable on the open interval (a,b), then there exists at least one c in the open interval (a,b) such that:

f'(c) = (f(b) - f(a)) / (b - a)

In other words, the derivative of the function at some point in the interval is equal to the average rate of change of the function over the interval.

In this problem, we apply the MVT to the interval [4,8] and use the given information to obtain an upper bound on f(8). We have:

f'(c) = (f(8) - f(4)) / (8 - 4)

Simplifying, we get:

f(8) - f(4) = 4f'(c)

Since f'(x) ≤ 10 for all x in (4,8), we have:

4f'(c) ≤ 4(10) = 40

Substituting this into the previous equation, we get:

f(8) - (-6) ≤ 40

f(8) + 6 ≤ 40

f(8) ≤ 34

Therefore, the largest possible value of f(8) is 34, which is the upper bound obtained using the Mean Value Theorem and the given conditions on f(x) and f'(x).

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The volume of the treasure chest is approximately 1.3153 [tex]m^{3}[/tex]

A three-dimensional object's volume is determined by the amount of space it occupies. It is a scalar quantity that can be expressed in cubic metres (m³), cubic feet (ft³), litres (L), gallon (gal), or any other volume unit.

Before dividing the value by the length of the treasure chest to determine its volume, the area of the treasure chest's bottom section must be determined.

A semicircle and a rectangle form the cross section. Let's calculate each of their areas separately, then add them all together:

Area of rectangle EY:

height   = 0.6m

breadth = 0.8m

area = height x breadth

       = 0.6 x 0.8  

       = 0.48[tex]m^{2}[/tex]

Area of a semicircle:

radius = half of the breadth

= 0.8 / 2

= 0.4m

area = 1/2 x [tex]\pi[/tex] x radius²  (since it's a semicircle)

= 1/2 x [tex]\pi[/tex] x [tex]0.4^{2}[/tex]

= 0.2513 [tex]m^{2}[/tex]

The total area of the crοss-sectiοn

=0.48 + 0.2513

= 0.7313[tex]m^{2}[/tex]

Nοw, we can find the volume οf the treasure chest by multiplying the crοss-sectiοnal area by its length:

volume = area x length

 = 0.7313[tex]m^{2}[/tex] x 1.8[tex]m[/tex]

 = 1.3153 [tex]m^{3[/tex]

Therefore, the volume of the treasure chest is apprοximately 1.3153[tex]m^{3}[/tex]

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the zeros of the quadratic equation are approximately:-x ≈ -0.53 and x ≈ 1.03

What is quadratic equation ?

In algebra, a quadratic equation is a polynomial equation of degree 2. It is an equation in which the highest power of the variable is 2. The general form of a quadratic equation is:

ax² + bx + c = 0

where a, b, and c are constants, and x is the variable.

Quadratic equations can have one, two, or zero real solutions, depending on the values of a, b, and c. The solutions of a quadratic equation can be found using the quadratic formula:

x = (-b ± sqrt(b² - 4ac)) / 2a

or by factoring the quadratic expression into two linear factors, and then solving for x. The quadratic formula works for all quadratic equations, while factoring can only be used for some quadratic equations that have integer roots.

To locate the zero of a quadratic equation given the values of x and y, we can set the equation equal to zero and solve for x. Since the given data consists of x and y values, we can use the method of interpolation to find the quadratic equation that passes through these points. To do this, we can use the formula for the quadratic function:

f(x) = ax² + bx + c

where a, b, and c are constants that we need to find. We can use the given data to form a system of three equations:

14 = a(-1)² + b(-1) + c

2 = a(0)² + b(0) + c

-3 = a(1)² + b(1) + c

Simplifying each equation, we get:

a - b + c = 14

c = 2

a + b + c = -3

Substituting c = 2 into the first and third equations, we get:

a - b + 2 = 14

a + b + 2 = -3

Solving for a and b, we get:

a = -8

b = -13

Therefore, the quadratic function that passes through the given points is:

f(x) = -8x² - 13x + 2

To find the zero of this quadratic equation, we can set it equal to zero and solve for x:

-8x² - 13x + 2 = 0

Using the quadratic formula, we get:

x = (-(-13) ± sqrt((-13)² - 4(-8)(2))) / (2(-8))

Simplifying, we get:

x = (13 ± sqrt(249)) / 16

Therefore, the zeros of the quadratic equation are approximately:

x ≈ -0.53 and x ≈ 1.03

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The correct test statistic for this hypothesis test is 3.21 or 0.2617

To determine the appropriate test statistic for this hypothesis test, we need to first state the null and alternative hypotheses.

In this case, the null hypothesis is that the population mean height of adult women is equal to 63 inches, while the alternative hypothesis is that the population mean height is greater than 63 inches.

Next, we can use the formula for a t-test to calculate the test statistic:

t = (sample mean - hypothesized mean)/(sample standard deviation/sqrt(sample size))

Plugging in the given values, we get:

t = (64.2 - 63)/(2.9√40) = 3.21 or 0.2617

Therefore, the correct test statistic for this hypothesis test is 3.21. or 0.2617

To determine whether this test statistic is statistically significant, we would need to compare it to a critical value from the t-distribution with 39 degrees of freedom (since we have a sample size of 40 and are estimating one parameter, the population mean). If the test statistic is greater than the critical value, we can reject the null hypothesis and conclude that the population mean height of adult women is greater than 63 inches at a given level of significance.

In summary, the correct test statistic for this hypothesis test is 3.21. To determine whether this test statistic is statistically significant, we would need to compare it to a critical value from the t-distribution with 39 degrees of freedom.

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Rounding the amount to the nearest dollar, we get $10.00 as the estimated tip amount.

In general, "amount" refers to a quantity or a sum of something. The specific context in which the term is used determines the meaning of the word more precisely.

In financial contexts, "amount" typically refers to a sum of money or other financial value, such as the amount of a payment, a loan, or an investment. In accounting, the amount may refer to the total value of assets, liabilities, or equity.

In scientific contexts, "amount" may refer to the quantity or volume of a substance or material, such as the amount of water in a solution, the amount of gas in a container, or the amount of a drug in a patient's bloodstream.

In general usage, "amount" can refer to a quantity of something that can be measured, counted, or expressed numerically, such as the amount of time spent on a task, the amount of food consumed, or the amount of work completed

$10.00.

Rounding the bill amount to the nearest dollar, we get $48. The 20% tip on $48 is $9.60. Rounding this amount to the nearest dollar, we get $10.00 as the estimated tip amount.

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Answer:

x -intercept  ---> (-6,0)

y-intercept ---> (0, 9)

Step-by-step explanation:

3x = -18

3x/3 = -18/3

x = (-6,0)

-2y = -18

-2y/-2 = -18/-2

y = (0, 9)

The round trip took Abdul 4/15 hours or approximately 16 minutes.

Let's start by finding the speed of the train. We know that the train goes 10 mph faster than the boat, and the boat goes 20 mph, so the speed of the train is:

20 + 10 = 30 mph

Now we can use the formula:

time = distance / speed

The distance traveled by Abdul in the round trip is 4 miles to the front entrance and 4 miles back to the parking lot, so a total of 8 miles.

Let's first find the time it takes Abdul to get to the park by train:

time_train = distance_train / speed_train

time_train = 4 / 30

time_train = 2/15 hours

So the total time for the round trip is:

total_time = time_train + time_boat

total_time = 2/15 + 1/5

total_time = 4/15 hours

Therefore, the round trip took Abdul 4/15 hours or approximately 16 minutes.

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