help me please! thanks bud

Rounding to the nearest whole number, Dr. Powell can expect about 16 micrograms of medication to be remaining in Ruby's body after 4 hours.

In mathematics, an equation is a statement that two expressions are equal. It typically consists of two sides, a left-hand side and a right-hand side, separated by an equal sign (=). Equations are used to represent relationships between variables or to solve for unknown values. They are an important tool in algebra, calculus, and other areas of mathematics and science.

Here,

The exponential equation in the form y = a(b)^x that can model the amount of medication in Ruby's body, y, x hours after it was administered is:

y = 40(0.8)ˣ

where:

a = 40, the initial amount of medication given to Ruby

b = 0.8, the factor by which the medication decreases each hour

To find the amount of medication remaining in Ruby's body after 4 hours, we can substitute x = 4 into the equation and evaluate:

y = 40(0.8)⁴

y = 40(0.4096)

y = 16.384

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Answer:

(x-2.5)^2 + 1.75

Step-by-step explanation:

To write that as an equation, we get x^2 - 5x + 8.

now, we need to complete the square:

x^2 - 5x + 6.25 + 1.75 =

(x-2.5)^2 + 1.75.

Answer:

Step-by-step explanation:

The distributive property of multiplication over addition can be used when you multiply a number by a sum. For example, suppose you want to multiply 3 by the sum of 10 + 2. 3(10 + 2) = ? According to this property, you can add the numbers and then multiply by 3.

The correct statement regarding the solution of the system of equations is given as follows:

A. The solution to the system is viable.

The situation is modeled by a system of equations, for which the variables are given as follows:

From each row of the table, the equations are given as follows:

Subtracting the third equation by the second, the value of x is given as follows:

2x = 178

x = 178/2

x = 89.

From the first equation, the value of y is given as follows:

y = [614 - 4 x 89]/2

y = 129.

From the second equation, the value of z is given as follows:

z = 555 - 3 x 89 - 129

z = 159.

Hence the system has a viable solution.

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The slope of the graph would give us the speed of the motion and that is  40 m/min.

We can use this principle to show that the slopes of two lines are equal if they are parallel and intersected by a transversal line. Here's how:

Draw two parallel lines, labeled as line A and line B.

Draw a transversal line that intersects both lines A and B at two points.

Draw a perpendicular line segment from one of the intersection points on line A to the transversal line, and label it as segment 1.

Draw a perpendicular line segment from the corresponding intersection point on line B to the transversal line, and label it as segment 2.

The triangles formed by segment 1, the transversal line, and a segment on line A, and by segment 2, the transversal line, and a segment on line B, are similar triangles.

Since the corresponding sides of similar triangles are proportional, we can set up the following proportion: segment 1 / segment on line A = segment 2 / segment on line B.

Simplifying the proportion, we get segment 1 / segment 2 = segment on line A / segment on line B.

Since segment 1 and segment 2 are both perpendicular to the transversal line, they represent the rise of the lines A and B, respectively. The segments on lines A and B represent the run of the lines A and B, respectively. Therefore, we can rewrite the proportion as rise of line A / run of line A = rise of line B / run of line B.

This shows that the slopes of the two parallel lines, line A and line B, are equal.

The slope of the graph is;

m = 140 - 60/2 - 0

m = 40 m/min

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Gareth had £4,199,999.94 in his account at the start of 2015 at rate 5%.

Compound interest is computed as a percentage of the principle plus the accrued interest, whereas simple interest is determined as a fixed percentage of the original amount. In other words, whereas compound interest is calculated on the principle amount plus any interest that has previously been earned, simple interest is computed on the initial principal amount. So, over time, compound interest often produces larger returns than simple interest, particularly for long-term investments.

The compound interest is given by:

[tex]A = P(1 + r/n)^{(n*t)}[/tex]

Substituting the given values, we get:

[tex]P = 4,862,025 / (1 + 0.05/1)^{(1*3)}\\P = 4,862,025 / 1.157625\\P = 4,199,999.94[/tex]

Gareth had £4,199,999.94 in his account at the start of 2015.

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The total area of the given composite geometric figure is: 27 cm²

The formula for the area of a parallelogram is:

Area = base * height

The formula for the area of a square is:

Area = ¹/₂ * base * height

The area of the square is:

Area = 3 * 3

= 9 cm²

Area of parallelogram = 3 * 6

Area of parallelogram = 18 cm²

Total area of composite figure = 18 + 9

= 27 cm²

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The expression that makes the equation true is: (4 x 3) ÷ 2.

option 1 is the correct answer.

In mathematics, an expression is a combination of symbols and/or values that represents a quantity or a relationship between quantities. It can include variables, constants, mathematical operations, and functions.

first, let's simplify the expression within the parentheses:

3 x 5 + 1 = 15 + 1 = 16

Now, we can simplify the entire expression:

1/2 x (3 x 5 + 1) - 2 = 1/2 x 16 - 2 = 8 - 2 = 6

So, we need to select the expression that equals 6:

6 ÷ 3 + 2 = 4

6 + 8 ÷ 4 = 8

(4 x 3) ÷ 2 = 6

Therefore, the expression that makes the equation true is: (4 x 3) ÷ 2.

option 1 is the correct answer.

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Answer:

        .

(4x3)---- 2

         .

B

Step-by-step explanation:

hope this help!

Answer:

Gary bought 5 notebooks

Step-by-step explanation:

the equation used for this would be 3n = 15

meaning you divide both sides by 3 which gets you n = 5

(a) The number of ways the books can be arranged in any order is 362880,

(b) The number of ways the mathematics books must be together and the novels must be together is 4320.

Part(a) :

The number of mathematics-book is = 3,

The number of novels is = 5,

The number of biology books is = 1,

So, there are total of (5+3+1) = 9 books

These 9 books can be arranged in 9! = 362880 ways.

Part(b) :

If the mathematics book are together we can consider the mathematics books as 1 book and

if the novels are together then these 5 novels can be considered as one.

So, there are total 3 books which can be arranged in 3! Ways.

And these 5 novels can be arranged in themselves in 5! Ways and

these 3 mathematics books can be arranged in themselves in 3! ways.

So, total number of ways = 3!×3!×5! =6×6×120 = 4320 ways.

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Answer:

(6,45)

Step-by-step explanation:

To graph each ratio relationship in the coordinate plane, we can plot the ordered pairs (time, distance) for each leg of the trip. For the first leg from Chicago to Los Angeles, the plane travels 15 miles every 2 minutes. So we can plot the following points:

(0, 0) - starting point

(2, 15) - after 2 minutes, the plane has traveled 15 miles

(4, 30) - after 4 minutes, the plane has traveled 30 miles

(6, 45) - after 6 minutes, the plane has traveled 45 miles

(8, 60) - after 8 minutes, the plane has traveled 60 miles

We can plot these points on a coordinate plane, with time on the x-axis and distance on the y-axis. The resulting graph would show a straight line with a slope of 7.5 (rise of 15/2 and run of 1).

For the second leg from Los Angeles to Chicago, the plane travels 25 miles every 3 minutes. So we can plot the following points:

(0, 0) - starting point

(3, 25) - after 3 minutes, the plane has traveled 25 miles

(6, 50) - after 6 minutes, the plane has traveled 50 miles

(9, 75) - after 9 minutes, the plane has traveled 75 miles

(12, 100) - after 12 minutes, the plane has traveled 100 miles

We can plot these points on the same coordinate plane as the first leg. The resulting graph would also show a straight line with a slope of 8.33 (rise of 25/3 and run of 1).

The two graphs would intersect at the point (6, 45), which represents the halfway point of the round trip.

Answer:

C. 13,200 mm²

Step-by-step explanation:

Overall, we have area of a rectangle which is 12000 and the area of the two triangles are 1200.

We both add them to get the area of the irregular shape.

12000 + 1200 = 13,200 mm²

Answer:

x² - 9x + 6

Step-by-step explanation:

The polynomial in standard form is:

x² - 9x + 6

This is a quadratic polynomial because it has a degree of 2, and it has three terms.

I remember doing this but I don’t seem to remember sorry

Answer:

y = - [tex]\frac{1}{2}[/tex] (x + 3)² + 4

Step-by-step explanation:

the equation of a parabola in vertex form is

y = a(x - h)² + k

where (h, k ) are the coordinates of the vertex and a is a multiplier

here (h, k ) = (- 3, 4 ) , then

y = a(x - (- 3) )² + 4 , that is

y = a(x + 3)² + 4

to ind a substitute the point (1, - 4 ) into the equation

- 4 = a(1 + 3)² + 4

- 4 = a(4)² + 4 ( subtract 4 from both sides )

- 8 = 16a ( divide both sides by 16 )

- [tex]\frac{8}{16}[/tex] = a , that is

a = - [tex]\frac{1}{2}[/tex]

y = - [tex]\frac{1}{2}[/tex] (x + 3)² + 4 ← equation of parabola

As it is known that the temperature of hot coffee will cool to room temperature following an exponential mode, the option which would linearize the data for temperature and minutes is "Minutes, ln(Temperature)". The Option B is correct.

Using logarithmic transformation, we can convert the exponential relationship between temperature and time into a linear relationship. By taking the natural logarithm of the temperature, we can rewrite the exponential model as:

ln(Temperature) = -kt + ln(T0)

In this model, ln(Temperature) is the natural logarithm of the temperature, k is a constant representing the rate of cooling, t is the time elapsed, and T0 is the initial temperature of the coffee.

This equation is in the form of a linear equation, y = mx + b, where ln(Temperature) is the y variable, -k is the slope, t is the x variable, and ln(T0) is the y-intercept. Therefore, plotting Minutes versus In(Temperature) will give a linear relationship.

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The equation is a linear combination of three angles that add up to 180°, he might consider using systems of linear equations or other algebraic methods to solve for the variables.

given that za + 2d + g = 180°, some observations that could potentially be useful to Jason include:

Identifying any relationships or constraints between the variables za, d, and g that might help him simplify or solve the equation. For example, if he knows that za and g are complementary angles (i.e., they add up to 90°), he could substitute 90 - za for g in the equation to get a new expression in terms of za and d.

Using additional information about the angles or the situation to derive new equations or constraints that could help him solve for one or more variables. For example, if he knows that za and d are equal (i.e., za = d), he could substitute za for d in the equation to get a new expression in terms of za and g.

Identifying any patterns or structures in the equation that might suggest a particular approach or technique for solving it. For example, if he notices that the equation is a linear combination of three angles that add up to 180°, he might consider using systems of linear equations or other algebraic methods to solve for the variables.

Ultimately, the most effective observations for completing the proof will depend on the specific details of the problem and the approach that Jason is taking.

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The complete question:Jason knows that za + 2d + g = 180°. Which of the following observations, if true, would allow him to prove a statement or theorem related to the angles za, d, and g?

Answer:

  64°

Step-by-step explanation:

You want the measure of angle ZOX, the smaller of a linear pair marked (3x -2)° and (5x +6)°.

The angles of a linear pair are supplementary—they total 180°.

  (5x +6) +(3x -2) = 180

  8x +4 = 180 . . . . . simplify

  8x = 176 . . . . . . subtract 4

  x = 22 . . . . . . divide by 8

The measure of angle ZOX is ...

  ∠ZOX = (3x -2)° = (3·22 -2)°

  ∠ZOX = 64°

__

Additional comment

Angle ZOY is ...

  ∠ZOY = (5·22 +6)° = 116°, the supplement of 64°.

Answer:

x=7

Step-by-step explanation:

Check the attachment below:  

Answer:

(-2/5, 11/5)

Step-by-step explanation:

We can use the formula for finding a point that divides a line segment into a given ratio. Let P be the point on the line segment QR that partitions it in the ratio 2:3. Then we have:

P = ( (3x2 + 2x1)/(3+2), (3y2 + 2y1)/(3+2) )

where (x1, y1) = (-8, -8) is the coordinates of Q and (x2, y2) = (2, 7) is the coordinates of R.

Substituting the values, we get:

P = ( (32 + 2(-8))/(3+2), (37 + 2(-8))/(3+2) )

P = ( (-2/5), (11/5) )

Therefore, the coordinates of the point P on the directed line segment QR that partitions it in the ratio 2:3 are (-2/5, 11/5).

Answer: 6(x+1)^2

Step-by-step explanation:

1. Find the GCF. Because you know the equation is 6x^2+12x+6, you can see that the coefficients, 6 and 12, are all factors of 6. To make factoring easier, factor out 6 from all the coefficients, which leaves you with 6(x^2+2x+1)

2. Factor the equation in the parentheses. If you have learned your perfect squares, then you know that x^2+2x+1 is (x+1)^2 because x^2+2x+1 = (x+1)(x+1) (you can foil that out if you want to check). Once finished with this, it leaves you with 6(x+1)^2

The triangles are necessarily congruent by the ASA congruence rule.

The ASA, which is an acronym for Angle-Side-Angle, congruence rule states that if two angles and an included side of one triangle are congruent to two angles and an included side of another triangle, then the two triangles are congruent.

The angle markings on the triangles ΔJLK and ΔZXY indicates;

∠J ≅ ∠Z, ∠K ≅ ∠Y

The side markings on the triangles indicates

Side JK in triangle ΔJLK is congruent to side ZY in triangle ΔZXY

Therefore, two angles and an included side in triangle ΔJLK are congruent to two angles and an included side in triangle ΔZXY, therefore, triangle ΔJLK is congruent to triangle ΔZXY by Angle-Side-Angle, ASA congruence rule.

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Real number that is greater than or equal to zero. The only number that is both positive and negative is the number 0.

5y+15

I think this is correct. Hope this helps:)

Answer: 5y + 15

Step-by-step explanation: 5(y+3)

                                            = 5(y) + 5(3)

                                            = 5y + 15

Binomial distributions and hypergeometric distributions are similar in that they both have two possible outcomes (success or failure) and the probability of success is constant in each trial. They also both assume that each trial is independent of each other.

Both binomial distributions and hypergeometric distributions are similar in the following ways: they are both discrete distributions, they both have two possible outcomes (success or failure), the probability of success is constant in each trial, and they both assume that each trial is independent of each other.

A binomial distribution is a probability distribution that models the number of successes in a given number of independent trials with the same probability of success for each trial. In a binomial distribution, the random variable X is the number of successes in the given number of trials.

The probability of a success for each trial remains constant. The mean and variance of the binomial distribution are given by the formula: μ = np and σ2 = npq, respectively.

A hypergeometric distribution is a probability distribution that models the probability of selecting a certain number of successes in a given number of draws from a finite population without replacement. In a hypergeometric distribution, the random variable X is the number of successes in the given number of draws.

The probability of a success for each draw remains constant.

The mean and variance of the hypergeometric distribution are given by the formula: μ = nx/N and σ2 = nx(N-n)(N-x)/N2(N-1), respectively.

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Answer:

I just had to say those numbers because of so I can send it like I'm about

To find the lower bound and upper bound of the difference m-n, we need to first find the possible range of values for m and n.

• For m rounded to 1 decimal place, the actual value could be anywhere between 48.15 and 48.25 (since the digit in the second decimal place could be anything from 0 to 9, and we round to the nearest 0.1).

• For n rounded to 1 decimal place, the actual value could be anywhere between 6.65 and 6.75.

Now, we can calculate the lower bound and upper bound of m-n:

Lower bound of m-n = (48.15 - 6.75) = 41.4

Upper bound of m-n = (48.25 - 6.65) = 41.6

Therefore, the lower and upper bounds of m-n are 41.4 and 41.6, respectively.

Answer:Exact Form:

g=10/3

Decimal Form:

g=3. ¯3

Mixed Number Form:

g=3 1/3

Step-by-step explanation: