Please awnser asap I will brainlist

Answer:

7(20) + (1/2)(20)(9) = 140 + 90 = 230 cm²

Answer:

(a)  $556 billion

(b)  $581 billion

(c)  $693 billion

Step-by-step explanation:

The given function is:

[tex]\boxed{A(x)=314e^{0.044x}}[/tex]

where A(x) is the assets (in billions of dollars) for a financial firm .

If x = 7 corresponds to the year 2007 then:

Therefore, to find the assets for each of the given years, substitute the corresponding value of x into the function.

[tex]\begin{aligned}A(13)&=314e^{0.044 \cdot 13}\\&=314e^{0.572}\\&=314(1.77180712...)\\&=556.34743707...\\&=556\; \sf (nearest\;billion)\end{aligned}[/tex]

[tex]\begin{aligned}A(14)&=314e^{0.044 \cdot 14}\\&=314e^{0.616}\\&=314(1.851507181...)\\&=581.3732549...\\&=581\; \sf (nearest\;billion)\end{aligned}[/tex]

[tex]\begin{aligned}A(18)&=314e^{0.044 \cdot 18}\\&=314e^{0.792}\\&=314(2.20780762...\\&=693.2515954...\\&=693\; \sf (nearest\;billion)\end{aligned}[/tex]

Answer:

Angle C must measure 40 degrees.

Step-by-step explanation:

All angles in a triangle add up to 180 degrees

(90-50)=40 degrees

We can check our answer by adding all the angles up

90+50+40=180

Angle C must be 40 degrees

To determine the appropriate verb form, consider the time of the action, its relation to the present or past events, and whether it is a general fact, completed action, ongoing situation, or action preceding another. Choose the verb tense that accurately conveys the intended meaning in the paragraph.

To determine which form of verb is appropriate to use in a paragraph, you need to consider the context and the intended meaning of the sentence or paragraph. Here are some general guidelines for using different tenses:

Present Simple Tense:

Use the present simple tense to talk about general facts, habits, routines, and permanent situations.

Example: "The sun rises in the east."

Past Simple Tense:

Use the past simple tense to talk about completed actions or events in the past.

Example: "She studied abroad last year."

Present Perfect Tense:

Use the present perfect tense to talk about past actions or events that have a connection to the present or when the exact time of the action is not specified.

Example: "I have visited Paris several times."

Past Perfect Tense:

Use the past perfect tense to talk about an action or event that happened before another past action or event.

Example: "She had already eaten dinner when I arrived."

To determine which tense to use, consider the timeline of events and the relationship between them. If you are referring to a specific time in the past, the past simple tense might be appropriate. If you want to emphasize the connection to the present, the present perfect tense might be suitable. If you need to establish a sequence of events in the past, the past perfect tense could be used.

However, it's important to note that these guidelines are not absolute, and there can be variations based on specific contexts and writing styles. It's always best to consult grammar rules and consider the meaning and context of your sentences to choose the most appropriate verb tense for your paragraph.

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The probability of drawing blue, red, and white balls consecutively is 120/3375 with replacement and 120/2730 without replacement.

To calculate the probability of drawing three balls from a box containing six white balls, five red balls, and four blue balls, we need to consider two scenarios: with replacement and without replacement.

(i) With replacement:

When each ball is replaced after it is drawn, the total number of balls remains the same for each draw. Therefore, the probability of drawing a specific color on each draw remains constant.

The probability of drawing a blue ball on each draw is 4/15, the probability of drawing a red ball is 5/15, and the probability of drawing a white ball is 6/15 (assuming all colors are equally likely to be drawn).

To find the probability of drawing a blue, red, and white ball consecutively, we multiply the probabilities together since the events are independent:

P(Blue, Red, White) = (4/15) * (5/15) * (6/15) = 120/3375

(ii) Without replacement:

When the balls are not replaced after being drawn, the total number of balls decreases for each subsequent draw. This affects the probability of each color being drawn on subsequent draws.

For the first draw, the probability of drawing a blue ball is 4/15, a red ball is 5/15, and a white ball is 6/15.

For the second draw, the probability of drawing a blue ball is 3/14, a red ball is 5/14 (as one blue ball is already drawn), and a white ball is 6/14.

For the third draw, the probability of drawing a blue ball is 2/13, a red ball is 4/13 (as two blue balls and one red ball are already drawn), and a white ball is 6/13.

To find the probability of drawing a blue, red, and white ball consecutively without replacement, we multiply the probabilities together:

P(Blue, Red, White) = (4/15) * (5/14) * (6/13) = 120/2730

Therefore, the probability of drawing blue, red, and white balls consecutively is 120/3375 with replacement and 120/2730 without replacement.

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Step-by-step explanation:

Part A: The graph of the system of inequalities consists of two lines and a shaded region.

The line 2x + 3y = 15 is a solid line (because of the "less than" symbol in the inequality) and is graphed using a straight line connecting two points. For example, when x = 0, y = 5, and when x = 7.5, y = 0.

The line x + y = 3 is a solid line (because of the "greater than or equal to" symbol in the inequality) and is graphed using a straight line connecting two points. For example, when x = 0, y = 3, and when x = 3, y = 0.

The shaded region represents the solution set. It is the area below the line 2x + 3y = 15 and above or on the line x + y = 3. This shaded region satisfies both inequalities simultaneously.

Part B: To determine if the point (5, 1) is included in the solution area, we substitute x = 5 and y = 1 into both inequalities:

2x + 3y < 15:

2(5) + 3(1) < 15

10 + 3 < 15

13 < 15

Since 13 is less than 15, the point (5, 1) satisfies the first inequality.

x + y ≥ 3:

5 + 1 ≥ 3

6 ≥ 3

Since 6 is greater than or equal to 3, the point (5, 1) satisfies the second inequality.

Since the point (5, 1) satisfies both inequalities, it is included in the solution area for the system.

Part C: Let's choose the point (2, 2) as another example from the solution set.

Interpretation in real-world context:

When we have x = 2 and y = 2, it means Michael decides to buy 2 cupcakes and 2 pieces of fudge. This combination of sweets satisfies the conditions set in the inequalities, ensuring that he can feed at least three siblings.

The point (2, 2) represents a valid solution in which Michael spends a total of $10 (2 cupcakes * $2/cupcake + 2 fudges * $3/fudge = $4 + $6 = $10). With this choice, he can afford to buy enough treats to feed his three siblings while staying within his budget of $15.

Answer:182.12 meters of fencing required.

Step-by-step explanation:

The estimated standard deviation of the bear weights, based on the given graph and using the 69-95-99.7% rule, is approximately 63.

The 69-95-99.7% (empirical) rule, also known as the 3-sigma rule, is a rule of thumb that applies to data that follows a normal distribution. According to this rule:

- Approximately 68% of the data falls within one standard deviation of the mean.

- Approximately 95% of the data falls within two standard deviations of the mean.

- Approximately 99.7% of the data falls within three standard deviations of the mean.

In the given graph, if we assume the bear weights follow a normal distribution, we can estimate the standard deviation using the 69-95-99.7% rule.

Based on the graph, we know that the midpoint of the distribution (mean) is 200. Assuming the graph is symmetric, we can estimate one standard deviation as half the distance between the mean (200) and either end (74 or 326).

To calculate this, we subtract the mean from one of the endpoints and divide by 2:

Standard Deviation ≈ (326 - 200) / 2 ≈ 126 / 2 ≈ 63

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The center of the ellipse defined by the equation 9x^2 + 4y^2 + 18z - 23 = 0 is (0, 0, 0).

9x^2 + 4y^2 + 18z - 23 = 0 must be rearranged to its standard form in order to determine the location of the ellipse's centre. The ellipse equation has the following standard form:

(x - h)^2/a^2 + (y - k)^2/b^2 + (z - l)^2/c^2 = 1,

where (h, k, l) represents the center of the ellipse, and a, b, and c are the semi-major, semi-minor, and semi-vertical axes, respectively.

Let's rearrange the given equation to match the standard form:

9x^2 + 4y^2 + 18z - 23 = 0

Dividing by 23 to simplify the equation:

(9x^2)/23 + (4y^2)/23 + 18z/23 - 1 = 0

Now, we can rewrite the equation as:

(9x^2)/23 + (4y^2)/23 + 18z/23 = 1

Comparing this with the standard form, we can identify the values of a, b, and c:

a^2 = 23/9

b^2 = 23/4

c^2 = 23/18

Taking the square roots of these values:

a ≈ √(23/9) ≈ 1.53

b ≈ √(23/4) ≈ 1.92

c ≈ √(23/18) ≈ 1.23

Therefore, the semi-major axis (a) is approximately 1.53, the semi-minor axis (b) is approximately 1.92, and the semi-vertical axis (c) is approximately 1.23.

The center of the ellipse is represented by the values (h, k, l). Since the equation does not involve any shifts or translations, the center is located at the origin (0, 0, 0).

As a result, (0, 0, 0) is the centre of the ellipse formed by the equation (9x2 + 4y2 + 18z - 23 = 0).

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Answer:

Center: (-3, 1)

Step-by-step explanation:

The center of an ellipse is always the point that is equidistant from the two foci and the two vertices.

In order to find the center of the ellipse, we can complete the square in both the x and y terms.

First, we move the constant term to the right side of the equation:

[tex]9x^2+18x + 4y^2-8y = 23[/tex]

The coefficient of x is 18, so half of it is 9, and squaring that gives us 81. Adding 81 to both sides of the equation gives us:

[tex]9x^2+18x + 81 = 23 + 81[/tex]

which combines the terms in x into a squared term:

[tex](9x+9)^2 = 104[/tex]

Similarly:

[tex]4y^2-8y + 4 = 23 + 4[/tex]

which combines the terms in y into a squared term:

[tex](2y-2)^2 = 27[/tex]

Now that we have completed the square in both x and y, we can write the equation in standard form for an ellipse:

[tex]\frac{(x+3)^2}{11^2} + \frac{(y-1)^2}{3^2} = 1[/tex]

The standard form for an ellipse is:

[tex]\boxed{\bold{\frac{(x-h)^2}{a^2} +\frac{ (y-k)^2}{b^2} =1 }}[/tex]

where (h, k) is the center of the ellipse, a is the radius in the x-direction, and b is the radius in the y-direction.

In the equation for our ellipse, (h, k) = (-3, 1).

So the center of the ellipse is at the point (-3, 1).

In the nearest tenth, this is (-3.0, 1.0).

Answer:

The one at the bottom right above the next button

Step-by-step explanation:

The correct statement is OB. The average rate of change of f is more than the average rate of change of g.

To determine the average rate of change (slope) of the functions f and g, we can use the formula:

Average Rate of Change = (f(x2) - f(x1)) / (x2 - x1)

For function f, using the given table, we can calculate the average rate of change between the points (0, 0) and (2, -2):

Average Rate of Change (f) = (-2 - 0) / (2 - 0) = -2 / 2 = -1

For function g, using the given points (-3, 5) and (0, 14), we can calculate the average rate of change:

Average Rate of Change (g) = (14 - 5) / (0 - (-3)) = 9 / 3 = 3

Comparing the average rates of change, we find that the average rate of change of f is -1, while the average rate of change of g is 3.

Therefore, the correct statement is:

OB. The average rate of change of f is more than the average rate of change of g.

The average rate of change of f is greater than the average rate of change of g, indicating that the function f is increasing at a faster rate than function g over the given interval.

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The sample variance (s²) is approximately 29.5 and the sample standard deviation (s) is approximately 5.4.

To find the sample variance and standard deviation,

Calculate the mean (average) of the given data set.

21 + 12 + 6 + 7 + 10 = 56

Mean = 56 / 5 = 11.2

Square the result of subtracting the mean from each data point.

(21 - 11.2)² = 96.04

(12 - 11.2)² = 0.64

(6 - 11.2)² = 27.04

(7 - 11.2)² = 17.64

(10 - 11.2)² = 1.44

Calculate the sum of the squared differences

96.04 + 0.64 + 27.04 + 17.64 + 1.44 = 142.8

Divide the sum by (n-1), where n is the number of data points (in this case, 5).

142.8 / (5-1) = 35.7

The result is the sample variance (s²).

Take the square root of the sample variance to determine the sample standard deviation (s).

s = √35.7 ≈ 5.4

Therefore, the sample variance is approximately 29.5 (rounded to one decimal place) and the sample standard deviation is approximately 5.4 (rounded to one decimal place).

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Answer:

Step-by-step explanation:

To find the density of the wooden board, we need to divide the mass of the board by its volume. The volume of a rectangular prism is calculated by multiplying its length, width, and height.

Given:

Length (l) = 0.3 m

Width (w) = 2.1 m

Height (h) = 0.1 m

Mass (m) = 0.17 kg

Volume (V) = l × w × h

V = 0.3 m × 2.1 m × 0.1 m

V = 0.063 m³

Density (ρ) = mass / volume

ρ = 0.17 kg / 0.063 m³

ρ ≈ 2.7 kg/m³

The density of the wooden board is approximately 2.7 kg/m³.

Answer:

A: $51.00

B: $54.57

Step-by-step explanation:

Let amount = $68.00

Part A:

Since the coupon is for 25%, the family pays 75% of $68.00

75% of $68.00 = 0.75 × $68.00 = $51.00

The new price is $51.00

Part B:

The tax is 7% of $51.00

7% of $51.00 = $3.57

The total price is the sum of $51.00 and the amount of tax, $3.57

Total price = $51.00 + $3.57 = $54.57

There are no valid values of 'a' and 'b' that satisfy the given equation.

a/(2x - 3) + b/(3x + 4) = (x + 7)/(6x^2 - x - 12)

We need to find the values of 'a' and 'b' that satisfy the equation.

First, let's find the common denominator of the fractions on the left-hand side of the equation, which is (2x - 3)(3x + 4):

[(a)(3x + 4) + (b)(2x - 3)] / [(2x - 3)(3x + 4)] = (x + 7)/(6x^2 - x - 12)

Expanding the numerator on the left-hand side, we get:

(3ax + 4a + 2bx - 3b) / [(2x - 3)(3x + 4)] = (x + 7)/(6x^2 - x - 12)

Combining like terms in the numerator:

(5ax + 2bx + 4a - 3b) / [(2x - 3)(3x + 4)] = (x + 7)/(6x^2 - x - 12)

Now, we can equate the numerators on both sides of the equation:

5ax + 2bx + 4a - 3b = x + 7

To solve for 'a' and 'b', we need to match the coefficients of 'x' and the constant terms on both sides of the equation.

Matching the coefficients of 'x':

5a = 1 (coefficient of 'x' on the right-hand side is 1)

2b = 1 (coefficient of 'x' on the left-hand side is 1)

Matching the constant terms:

4a - 3b = 7

We have a system of equations:

5a = 1

2b = 1

4a - 3b = 7

Solving the first equation for 'a':

a = 1/5

Solving the second equation for 'b':

b = 1/2

Substituting the values of 'a' and 'b' into the third equation:

4(1/5) - 3(1/2) = 7

4/5 - 3/2 = 7

(8 - 15)/10 = 7

-7/10 = 7

The equation is inconsistent, and there is no solution that satisfies all the conditions.

As a result, the preceding equation cannot be satisfied by any real values for 'a' and 'b'.

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Answer:

  A. The multiplication that takes place while distributing comes before addition and subtraction in order of operations.

Step-by-step explanation:

You want to know the error that adding -4+4 on the left and 1+1 on the right represents in the solution of the equation ...

The correct solution procedure would be to eliminate the parentheses using the distributive property as a first step:

  4x -6x +8 +4 = -x +3x +3 +1

Comparing this to Maricella's first step, we see that she ignored the step of using the distributive property to multiply the constants inside parentheses by the factor outside. The appropriate description of Maricella's mistake is ...

A. The multiplication that takes place while distributing comes before addition and subtraction in order of operations.

__

Additional comment

Adding like terms would give ...

  -2x +12 = 2x +4

  8 = 4x . . . . . . . . . . . add 2x-4 to both sides

  2 = x . . . . . . . . . . divide by 4

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Answer:

Para resolver este problema, podemos plantear un sistema de ecuaciones. Si definimos "p" como el número de velas pequeñas y "g" como el número de velas grandes, podemos expresar la información del problema de la siguiente manera:

p + g = 20 (la tienda vendió un total de 20 velas) 10.98p + 27.98g = 355.60 (el ingreso total por la venta de velas fue de $355.60)

Podemos resolver este sistema de ecuaciones utilizando el método de sustitución. Despejando "p" de la primera ecuación, obtenemos:

p = 20 - g

Luego, sustituimos esta expresión de "p" en la segunda ecuación:

10.98(20 - g) + 27.98g = 355.60

220.20 - 10.98g + 27.98g = 355.60

17.00g = 135.40

g = 8

Por lo tanto, la tienda vendió 8 velas grandes.

Step-by-step explanation:

Naomi will take approximately 93 quarters (around 23 years and 3 months) to save $100,000 by making quarterly payments of $1,500 with a 4.4% interest rate.

Doubling her payment amount would save her time, but the exact time saved would require recalculating with the new payment amount.

To calculate the time it will take for Naomi to reach her goal of $100,000, we can use the future value formula for a series of periodic payments:

FV = P * [(1 + r)^n - 1] / r

Where:

FV = Future value (goal amount) = $100,000

P = Payment amount per period = $1,500

r = Interest rate per period = 4.4% per year / 4 (quarterly compounding) = 1.1% per quarter

n = Number of periods (quarters) to reach the goal (what we need to find)

Plugging in the values, we have:

$100,000 = $1,500 * [(1 + 0.011)^n - 1] / 0.011

Simplifying the equation, we have:

[(1 + 0.011)^n - 1] = $100,000 * 0.011 / $1,500

[(1.011)^n - 1] = 0.073333...

Now, we can solve this equation for n using logarithms:

n = log(0.073333...) / log(1.011)

Using a financial calculator or an online calculator, we find that n ≈ 92.33 quarters.

Since Naomi is making quarterly payments, we round up to the next whole number, giving us a total of 93 quarters.

Therefore, it will take Naomi approximately 93 quarters (or around 23 years and 3 months) to reach her goal of $100,000.

Doubling her payment amount to $3,000 per quarter would indeed save her time in reaching her goal. The higher payment amount means she would accumulate the desired amount faster. However, to determine the exact time saved, we would need to recalculate using the same formula as above with P = $3,000. The time saved will depend on the specific calculation result.

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The calculated value of x in the triangle is 40°

From the question, we have the following parameters that can be used in our computation:

The figure (see attachment)

Using the theorem of linear pair, we have

∠DBA + ∠ABC = 180°

Using the given values, we have

∠100° + ∠ABC = 180°

Collect the like terms

∠ABC = 180° - 100°

Evaluate

∠ABC = 80°

The sum of angles of a triangle is 180° .

So, in triangle ABC

∠A + ∠B + ∠C = 180°

Using the given values, we have

x + 80 + 60 = 180°

Evaluate the sum

x + 140 = 180°

Collect the like terms

x = 180° - 140°

Evaluate

x = 40°

Hence, the value of x is 40°

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Answer:

Step-by-step explanation:

The regression equation that correctly models the data is: y = 5.71x + 27.6.

The correct answer to the given question is option D.

Regression equations are mathematical models that relate two or more variables to find the relationship between them. One variable, denoted as y, is considered the dependent variable. The other variable, denoted as x, is considered the independent variable.

In this case, the independent variable is the size of the outdoor deck, while the dependent variable is the estimated cost to construct it.

There are different types of regression equations. The one that fits this scenario is the linear regression equation, which has the form y = mx + b, where m is the slope of the line and b is the y-intercept.

The slope represents the change in y for each unit change in x, while the y-intercept represents the value of y when x is zero. To find the regression equation that correctly models the data, we need to calculate the slope and the y-intercept using the given values.

We can use the following formulas:

Slope:  m = [(n∑xy) - (∑x)(∑y)] / [(n∑x2) - (∑x)2]

Y-intercept: b = (∑y - m∑x) / n Where n is the number of data points, which is 6 in this case.

Using the given values, we get: Slope: m = [(6)(2,010,500) - (1,193)(6,950)] / [(6)(346,337) - (1,193)2] = 5.71

Y-intercept: b = (6,950 - (5.71)(1,193)) / 6 = 27.6

Therefore, the regression equation that correctly models the data is: y = 5.71x + 27.6

The answer is option D.

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The ordered pairs which are in the solution set of the system of linear inequalities are (5, –2), (3, 1), (4, 2).

The correct answer to the given question is option C.

The system of linear inequalities is:y > -1/2 x y < 1/2 x + 1

On a coordinate plane, two straight lines are shown.

The first solid line has a negative slope and goes through (0, 0) and (4, -2).

Everything above the line is shaded.

The second dashed line has a positive slope and goes through (-2, 0) and (2, 2).

Everything below the line is shaded.

We will check which of the given ordered pairs lie in the solution set of this system of linear inequalities. 1. (5, -2) Putting x = 5 and y = -2, we get:

y > -1/2 x   ⇒   -2 > -1/2 (5)   ⇒   -2 > -2.5  which is false.

xy < 1/2 x + 1   ⇒   (5)(-2) < 1/2 (5) + 1   ⇒   -10 < 3.5  which is false.

Therefore, the ordered pair (5, -2) is not in the solution set of the system of linear inequalities. 2. (3, 1) Putting x = 3 and y = 1, we get:

y > -1/2 x   ⇒   1 > -1/2 (3)   ⇒   1 > -1.5  which is true.

xy < 1/2 x + 1   ⇒   (3)(1) < 1/2 (3) + 1   ⇒   3 < 2.5  which is false.

Therefore, the ordered pair (3, 1) is not in the solution set of the system of linear inequalities. 3. (-4, 2) Putting x = -4 and y = 2, we get:y > -1/2 x   ⇒   2 > -1/2 (-4)   ⇒   2 > 2  which is false. xy < 1/2 x + 1   ⇒   (-4)(2) < 1/2 (-4) + 1   ⇒   -8 < -0.5  which is true.

Therefore, the ordered pair (-4, 2) is in the solution set of the system of linear inequalities. Hence, the answer is (5, –2), (3, 1), (4, 2).

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Answer:

Isaac Newton (late 17th century) - Newton made significant contributions to calculus and mathematical physics. His book "Philosophiæ Naturalis Principia Mathematica" laid the groundwork for classical mechanics.

Answer:

math = 227.98

programming = 42.55

Step-by-step explanation:

We have
3m + 4p = 854.14 -eq(1)

8m + 1p = 1866.39 -eq(2)

rq(2) x 4: 32m + 4p = 7465.56 -eq(3)

eq(3)-eq(1):

32m + 4p = 7465.56

- ( 3m + 4p = 854.14)

--------------------------------

29m = 6611.42

--------------------------------

⇒ m = 6611.42/29

m = 227.98

sub in eq(1)

3(227.98) + 4p = 854.14

4p = 854.14 - 683.94

4p = 170.2

p = 170.2/4

p = 42.55

Answer:

violence figer in the past two years

Answer:

The answer is 32

Step-by-step explanation:

The formula for finding the area of a trapezoid is:

         ((base 1 + base 2)/ 2 )* h

Now all you have to do is substitute the numbers in.

Note: bases will always be the ones like 12 and 4 in this case. We have just named then 1 and 2.

Answer:

32 square units

Step-by-step explanation:

[tex]\displaystyle A=\frac{1}{2}(b_1+b_2)h=\frac{1}{2}(12+4)(4)=\frac{1}{2}(16)(4)=\frac{1}{2}(64)=32[/tex]

Note that [tex]b_1[/tex] and [tex]b_2[/tex] are the lengths of each base of the trapezoid, so it doesn't matter which is which.

Answer:

D. 48

Step-by-step explanation:

When a tangent and a secant, two secants, or two tangents intersect outside a circle then the measure of the angle formed is one-half the positive difference of the measures of the intercepted arcs.

56 = 1/2(160 - ?)

112 = 160 - ?

? = 160 - 112 = 48

Answer:

[tex]x = 5\sqrt3[/tex]

Step-by-step explanation:

We can solve for the side length x in this 30-60-90 triangle by using the ratio of side lengths for that specific type of right triangle:

In this triangle, we can identify the smallest side (corresponding to 1 in the ratio) as 5. This means we can solve for x by multiplying 5 by [tex]\sqrt3[/tex]. Thus:

[tex]\boxed{x = 5\sqrt3}[/tex]

Answer:

[tex]_{13}C_5=1287[/tex]

Step-by-step explanation:

[tex]\displaystyle _nC_r=\frac{n!}{r!(n-r)!}\\\\_{13}C_5=\frac{13!}{5!(13-5)!}\\\\_{13}C_5=\frac{13!}{5!\cdot8!}\\\\_{13}C_5=\frac{13*12*11*10*9}{5*4*3*2*1}\\\\_{13}C_5=\frac{154440}{120}\\\\_{13}C_5=1287[/tex]

[tex] \sf \hookrightarrow \: \: {}^{13}{ C}_{5} \: [/tex]

[tex] \sf \hookrightarrow \: \: {}^{13}{ C}_{5} \: = \frac{13!}{5!(13 - 5)!} \\ [/tex]

[tex] \sf \hookrightarrow \: \: {}^{13}{ C}_{5} \: = \frac{13!}{5!(8)!} \\ [/tex]

[tex] \sf \hookrightarrow \: \: {}^{13}{ C}_{5} \: = \frac{13!}{5! \times 8!} \\ [/tex]

[tex] \sf \hookrightarrow \: \: {}^{13}{ C}_{5} \: = \frac{13 \times 12 \times 11 \times 10 \times 9 \times 8!}{5! \times 8!} \\ [/tex]

[tex] \sf \hookrightarrow \: \: {}^{13}{ C}_{5} \: = \frac{13 \times 12 \times 11 \times 10 \times 9 \times \cancel{8!}}{5! \times \cancel{8!}} \\ [/tex]

[tex] \sf \hookrightarrow \: \: {}^{13}{ C}_{5} \: = \frac{13 \times 12 \times 11 \times 10 \times 9 }{5 \times 4 \times 3 \times 2 \times 1} \\ [/tex]

[tex] \sf \hookrightarrow \: \: {}^{13}{ C}_{5} \: = \frac{156 \times 110 \times 9 }{20 \times 6 \times 1} \\ [/tex]

[tex] \sf \hookrightarrow \: \: {}^{13}{ C}_{5} \: = \frac{156 \times 990 }{20 \times 6 } \\ [/tex]

[tex] \sf \hookrightarrow \: \: {}^{13}{ C}_{5} \: = \frac{154440 }{120 } \\ [/tex]

[tex] \sf \hookrightarrow \: \: {}^{13}{ C}_{5} \: = 1287 \\ [/tex]