The revenue from selling q items is R(q)=625q−q2, and the total cost is C(q)=50+6q. Write a function that gives the total profit earned, and find the quantity which maximizes the profit.

The fully expanded expression using logarithm properties is:

[tex]In(8x^2 - 72x + 112) = 2.079 + In(x - 2) + In(x –-7)[/tex]

To expand the given expression[tex]In(8x^2 - 72x + 112)[/tex], we can use the following logarithmic properties:

Product Rule: [tex]logb (xy) = logb x + logb y[/tex]

Quotient Rule: [tex]logb (x/y) = logb x - logb y[/tex]

Power Rule:[tex]logb (x^a) = a logb x[/tex]

We can first factor out a common factor of 8 from the expression inside the logarithm:

[tex]In(8x^2 - 72x + 112) = In[8(x^2 - 9x + 14)][/tex]

Using the distributive property, we can expand the expression inside the logarithm:

[tex]In[8(x^2 - 9x + 14)] = In(8) + In(x^2 - 9x + 14)[/tex]

Now, we need to expand the second logarithm. We notice that the expression inside the logarithm can be factored as follows:

[tex]x^2 - 9x + 14 = (x - 2)(x - 7)[/tex]

Using the product rule, we can write:

[tex]In(x^2 - 9x + 14) = In[(x - 2)(x - 7)][/tex]

[tex]= In(x - 2) + In(x - 7)[/tex]

Putting all the pieces together, we get:

[tex]In(8x^2 - 72x + 112) = In(8) + In(x^2 - 9x + 14)[/tex]

[tex]= In(8) + In(x -2) + In(x - 7)[/tex]

Finally, we can simplify the numerical expression In(8) by using the fact that ln(e) = 1:

[tex]In(8) = ln(8)/ln(e) = 2.079/1 = 2.079[/tex]

So the fully expanded expression using logarithm properties is:

[tex]In(8x^2 - 72x + 112) = 2.079 + In(x - 2) + In(x -7)[/tex]

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a. The down payment is $22,500.

b. The mortgage is $202,500.

c. The monthly mortgage payment is $1,027.

a. The down payment is 10% of the home price, which is $225,000 x 0.1 = $22,500.

b. The mortgage is the remaining amount that you need to pay, which is $225,000 - $22,500 = $202,500.

c. The monthly mortgage payment can be calculated using the formula for a fixed-rate mortgage:

Monthly Payment = P [ i(1 + i)^n ] / [ (1 + i)^n – 1]

where P is the principal amount (the mortgage), i is the monthly interest rate (4.5% / 12 = 0.375%), and n is the total number of monthly payments (30 years x 12 months/year = 360).

Plugging in the values, we get:

Monthly Payment = $202,500 [ 0.00375(1 + 0.00375)^360 ] / [ (1 + 0.00375)^360 – 1] = $1,027.

Therefore, your monthly mortgage payment will be $1,027.

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0 J. When the child carries the box at a constant speed, the net force on the box is zero because there is no acceleration. Therefore, the work done by the child on the box is zero. So, the correct option is 0 J.

To determine the amount of work done by the child while walking across the floor at a constant speed, we need to consider the following terms: work, force, and displacement.

Work is the amount of energy transferred when a force is applied over a certain distance. It is calculated as:

Work = Force x Distance x cos(θ)

where Force is the applied force, Distance is the displacement, and θ is the angle between the force and displacement vectors.

When the child carries the box with a constant speed across the room, the force applied is equal to the gravitational force acting on the box (i.e., the weight of the box). However, since the force and displacement are in different directions (the force is acting vertically, while the displacement is horizontal), the angle between the force and displacement is 90 degrees.

Now, we know that cos(90°) = 0. Thus,

Work = Force x Distance x cos(90°) = Force x Distance x 0 = 0 J

So, the work done by the child on the box while walking across the floor at constant speed is 0 J.

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Let's represent the width of the rectangular course as $w$. Then the length of the rectangular course can be represented as $2w$, since the ratio of the length to the width is given as 2:1.

We know that the total length of the course is 2.4 kilometers, so we can write an equation:

$\sf\implies\:2w + 2(2w) = 2.4$

Simplifying the equation:

$\sf\implies\:6w = 2.4$

$\sf\implies\:w = \frac{2.4}{6}$

$\bigstar\implies\sf{\textbf{\boxed{w = 0.4}}}$

Therefore, the width of the course is 0.4 kilometers.

The length of the course is $\sf\:2w = 2(0.4)=$

${\boxed{\sf{0.8 kilometers.}}}$

Hence, the length of the course is 0.8 kilometers and the width of the course is 0.4 kilometers.

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[tex]\begin{align}\colorbox{black}{\textcolor{white}{\underline{\underline{\sf{Please\: mark\: as\: brillinest !}}}}}\end{align}[/tex]

[tex]\textcolor{lime}{\small\textit{If you have any further questions, feel free to ask!}}[/tex]

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Answer:

609 pages

Hope this helps!

Step-by-step explanation:

9 books = 5481 pages

1 book = ? pages

9 books ÷ 9 = 1 book  so  5481 pages ÷ 9 = 609 pages

1 book has 609 pages.

The rate of the boat in still water is 5 miles per hour and rate of the boat in current is 3 miles per hour.

Let us represent the rate of boat in still water hence and rate of boat in current be y. Also, we know that speed = distance/time. Hence, keep the values in formula -

Converting mixed fraction to fraction, time = 3/2 hour

Time = 1.5 hour

1.5 (x + y) = 12 : equation 1

Divide the equation 1 by 3

0.5 (x + y) = 4 : equation 2

6 (x - y) = 12 : equation 3

Divide the equation 3 by 6

(x - y) = 2

x = 2 + y : equation 4

Keep the value of x from equation 4 in equation 2

0.5 (2 + y + y) = 4

1 + y = 4

y = 4 - 1

y = 3 miles/ hour

Keep the value y in equation 4 to get x

x = 2 + 3

x = 5 miles per hour

The rate in still water and current is 5 and 3 miles per hour.

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The complete question is-

It takes a boat 1 (1/2) hr to go 12 mi downstream, and 6 hr to return. Find the rate of the boat in still water and the rate of the current.

It's arithmetic and the common difference should be -4.

Arithmetic = Adding/Subtracting

Geometric = Multiplying/Dividing

The sequence is a steady decline of subtracting 4.

The equation of the plotted absolute value function graph is

y = |x - 1| - 1

The equation of the graph which is a graph of absolute value function is solved using transformation

The parents equation or original equation is

y = |x|

Then a shift 1 unit to the right direction is gotten by

y = |x - 1|

The second transformation is a downward shift of 1 unit, this results to the equation of the form

y = |x - 1| - 1

The graph is potted and attached

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The area of the first triangle is 0 square feet.

To find the area of the first triangle with the given side lengths of 1 ft, 3 ft, and 4 ft, you can use Heron's formula.

Calculate the semi-perimeter (s) of the triangle:
s = (a + b + c) / 2
where a, b, and c are the side lengths of the triangle.
s = (1 + 3 + 4) / 2 = 8 / 2 = 4 ft

Apply Heron's formula to find the area (A) of the triangle:
A = √(s * (s - a) * (s - b) * (s - c))
A = √(4 * (4 - 1) * (4 - 3) * (4 - 4))
A = √(4 * 3 * 1 * 0)
A = √0 = 0

The area of the first triangle is 0 square feet. This means that the given side lengths do not form a valid triangle, as two sides' lengths (1 ft and 3 ft) do not add up to be greater than the length of the third side (4 ft).

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The estimated surface area of the bead is 52π square millimeters.

To estimate the  face area of the blob, we need to find the  face area of the sphere and abate the  face area of the spherical hole.   The  face area of a sphere is given by the formula   A =  4πr2   where r is the compass of the sphere.

 The radius of the sphere is: r = 8 mm / 2 = 4 mm.

The surface area of the sphere is: S_sphere = 4π[tex]r^{2}[/tex] = [tex]4π(4 mm)^{2}[/tex] =64 [tex]mm^{2}[/tex]

The radius of the cylinder is: r = 2 mm / 2 = 1 mm.

The height of the cylinder is: h = 8 mm - 2 mm = 6 mm.

The surface area of the cylinder is: S_cylinder = 2πrh = 2π(1 mm)(6 mm) = 12π [tex]mm^{2}[/tex]

The estimated surface area of the bead is: S_bead = S_sphere - S_cylinder = 64π [tex]mm^{2}[/tex] - 12π [tex]mm^{2}[/tex] = 52π [tex]mm^{2}[/tex]

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Your answer: a. $525

The "12 months is the same as cash" plan means that if you pay off the laptop within 12 months, you won't be charged any interest.

Since you plan to pay off the laptop in 11 months, which is within the 12-month period, you will not be assessed the 15.5 percent APR.

Therefore, you only need to pay the original cost of the laptop, which is $525.
To summarize, as long as you pay the full amount within the specified 12-month period, you avoid the additional interest charges. In this case, you will pay the laptop off in 11 months, so your total payment will be $525.

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If elijah and riley are playing a board game elijah choses the dragon for his game piece and rily choses the cat for hers. the measure of angle B is : B. 49.734 degrees.

To find the measure of angle B, we can use the law of cosines, which relates the lengths of the sides of a triangle to the cosine of the angles. Specifically, we can use the following formula:

c^2 = a^2 + b^2 - 2ab*cos(C)

where a, b, and c are the lengths of the sides of the triangle opposite to the angles A, B, and C, respectively.

In this case, we know the lengths of sides b and c, and the measure of angle A. We want to find the measure of angle B. So we can rearrange the formula above to solve for cos(B):

cos(B) = (a^2 + b^2 - c^2) / 2ab

Then we can take the inverse cosine of both sides to get the measure of angle B:

B = cos^-1[(a^2 + b^2 - c^2) / 2ab]

Substituting the given values, we have:

a = ?

b = 10

c = 13

A = 33 degrees

To find side a, we can use the law of sines, which states that the ratio of the length of a side of a triangle to the sine of the angle opposite that side is the same for all three sides. Specifically, we can use the following formula:

a / sin(A) = b / sin(B) = c / sin(C)

Solving for a, we have:

a = sin(A) * c / sin(C)

Substituting the given values, we have:

a = sin(33 degrees) * 13 / sin(C)

To find sin(C), we can use the fact that the angles in a triangle add up to 180 degrees:

C = 180 - A - B

Substituting the given values, we have:

C = 180 - 33 - B

C = 147 - B

So, we can write:

sin(C) = sin(147 - B)

Substituting into the equation for a, we have:

a = sin(33 degrees) * 13 / sin(147 - B)

Now, substituting all the values in the equation for cos(B), we get:

cos(B) = (a^2 + b^2 - c^2) / 2ab

cos(B) = [sin(33 degrees)^2 * 13^2 + 10^2 - 13^2] / 2 * sin(33 degrees) * 10

cos(B) = (169 * sin(33 degrees)^2 + 100 - 169) / (20 * sin(33 degrees))

cos(B) = (169 * sin(33 degrees)^2 - 69) / (20 * sin(33 degrees))

Now, we can substitute this into the equation for B, and use a calculator to find the value of B:

B = cos^-1[(a^2 + b^2 - c^2) / 2ab]

B = cos^-1[(169 * sin(33 degrees)^2 - 69) / (20 * sin(33 degrees))]

B ≈ 49.734 degrees

Therefore, the measure of angle B is approximately 49.734 degrees. The answer is (B) 49.734°.

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1. Chelsea Menken's debt-to-income ratio is 35.7%.

2. Her debt situation is concerning because she accumulated significant student loan debt and credit card debt.

The debt-to-income ratio means percentage of gross monthly income that goes to paying your monthly debt payments

Her total monthly debt payments is:

= $385 (Student loans) + $240 (Credit card) + $1,100 (Rent)

= $1,725.

Her total monthly income after taxes is:

= $58,000 / 12 months

= $4,833.33 per month.

The debt-to-income ratio will be:

= Total monthly debt payments / Monthly income after taxes

= $1,725 / $4,833.33

= 0.357

= 35.7%.

Her debt situation is concerning, so, it important for to develop a plan to pay off the debts in order to avoid accruing more interest and damaging her credit score.

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The landscaper needs to buy approximately 85.33 bags of topsoil to cover the whole garden.

The landscaper uses 4 bags of topsoil to cover 3/8 of the garden. To cover the whole garden, he would need:

First, we need to find how many bags of topsoil he needs per 1/8 of the garden:

4 bags / 3/8 of the garden = 32/3 bags of topsoil per 1 garden

Then, we can find the number of bags he needs for the whole garden:

32/3 bags * 8 = 256/3 bags or 85.33 bags (rounded to two decimal places)

Therefore, the landscaper needs to buy approximately 85.33 bags of topsoil to cover the whole garden.

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The estimated mean interest rate for 60-month fixed-rate auto loans at lending institutions in the urban area is 3.59% (the calculated mean from the given data).

To calculate the estimated mean interest rate, we need to find the average of the interest rates provided by the 12 lending institutions. The given data is as follows:

3.25%, 3.50%, 3.75%, 3.25%, 3.80%, 3.90%, 3.95%, 3.75%, 3.40%, 3.50%, 3.60%, 3.65%

The mean is calculated by adding up all the interest rates and then dividing by the total number of rates. Therefore,

Mean = (3.25 + 3.50 + 3.75 + 3.25 + 3.80 + 3.90 + 3.95 + 3.75 + 3.40 + 3.50 + 3.60 + 3.65)/12

Mean = 3.59%

Hence, the estimated mean interest rate for 60-month fixed-rate auto loans at lending institutions in the urban area is 3.59%.

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The finance charge for a $7000 two year loan with a 6.75% APR is $945.

To determine the finance charge for a $7000 two year loan with a 6.75% APR, we need to use the following formula:

Finance charge = (Amount borrowed × Annual percentage rate) × Time period

Given that, the amount borrowed is $7000, the annual percentage rate (APR) is 6.75%, and the time period is two years.

First, we need to convert the APR to a decimal by dividing it by 100:

APR = 6.75%

APR = 6.75/100

APR = 0.0675

Now we can plug in the values into the formula:

Finance charge = (Amount borrowed × Annual percentage rate) × Time period

Finance charge = ( $7000 × 0.0675) x 2

Finance charge = $945

Therefore, the finance charge  is $945.

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The set of ordered pairs that does NOT represent a function is option B) (0, 1), (2, 2), (4, 8), (2, 7), (5, 8), (7, 9)

  A function is a term that do not have two different outputs that is (y) for the same input(x).

Note that

For option A: The x values are {0,2,4,-2,5} Here none of the x values are repeated, So, it represents a function.

For option B: The input value 2 is linked with two different output values (2 and 7), so this set of ordered pairs does not stand a function.

Based on the explanation of the function given above, if x=2, the 'y' can not be equal to 2, 7. So, this is not a function.

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The camp would need 24 counselors for the estimated returning campers.

Midsummer is typically around the middle of the summer season, which is usually around the end of July. In this scenario, at the beginning of the summer, there are 540 campers and 36 counselors at a camp.

Part a asks us to determine how many additional counselors are needed to maintain the same ratio of campers to counselors if 0 additional campers join the camp by midsummer.

To solve this problem, we can set up a proportion:

540 campers / 36 counselors = (540 + 0) campers / x counselors

We can simplify this proportion by cross-multiplying and solving for x:

540x = 36(540 + 0)
x = 36(540 + 0) / 540
x = 36

Therefore, the camp would need an additional 36 counselors to maintain the same ratio of campers to counselors if no additional campers joined by midsummer.

Part b asks us to determine how many campers can be expected to return the following year if 2/3 of the current campers plan to come back. We can set up a proportion for this problem as well:

2/3 (current campers) = x (expected returning campers) / 540 (current campers)

We can solve for x by cross-multiplying and simplifying:

2/3 (540) = x
x = 360

Therefore, the camp can expect around 360 campers to return the following year.

Part c asks us to determine how many counselors will be needed for the estimated returning campers. We can set up a proportion once again:

540 (current campers) / 36 (current counselors) = 360 (expected returning campers) / x (needed counselors)

We can solve for x by cross-multiplying and simplifying:

540x = 36(360)
x = 24

Therefore, the camp would need 24 counselors for the estimated returning campers.

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The derivative of the function is y' = 50e^(-0.06x) - 3xe^(-0.06x). The x-intercept is approximately x ≈ 16.273. The y-intercept is y = 0. The horizontal asymptote is y = 0, which occurs as x approaches infinity.

To find the derivative of the function y = 50xe^-0.06x, we can use the product rule and the chain rule.

y' = 50e^-0.06x - 50xe^-0.06x(0.06)

Simplifying, we get y' = 50e^-0.06x(1-0.06x)

To find the x-intercept, we need to set y=0 and solve for x:

0 = 50xe^-0.06x

Since e^-0.06x is never zero, we can divide both sides by it:

0 = 50x

So the x-intercept is x=0.

To find the y-intercept, we need to set x=0 and solve for y:

y = 50(0)e^0

So the y-intercept is y=0.

To find the horizontal asymptote, we can take the limit as x approaches infinity:

lim (x→∞) 50xe^-0.06x = 0

So the horizontal asymptote is y=0. This horizontal asymptote occurs as x approaches infinity.

1. Consider the function: y = 50xe^(-0.06x)

2. Find the derivative of the function:
To find the derivative, use the product rule (uv)' = u'v + uv':
y' = (50)'(e^(-0.06x)) + (50)(e^(-0.06x))(-0.06)
y' = 50e^(-0.06x) - 3xe^(-0.06x)

3. The x-intercept is:
To find the x-intercept, set y = 0 and solve for x:
0 = 50xe^(-0.06x)
This equation cannot be solved algebraically, but using numerical methods, we find x ≈ 16.273

4. The y-intercept is:
To find the y-intercept, set x = 0 and solve for y:
y = 50(0)e^(-0.06(0))
y = 0

5. Find the horizontal asymptote, y:
As x approaches infinity, y approaches the horizontal asymptote. In this case, the exponential term (e^(-0.06x)) approaches 0:
y = 50xe^(-0.06x)
y ≈ 50x(0)
y ≈ 0

The horizontal asymptote is y = 0, and it occurs as x approaches infinity.

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The probability to get 5 and blue that is the value of P(5 and blue) = 1/24.

Hence the correct option is (B).

From the definition of Probability we can know that,

Probability of an event = (The number of outcomes favorable to the event)/(Total number of outcomes)

Here, Sample space if we roll a dice = {1, 2, 3, 4, 5, 6}

Total number of outcomes = 6

5 is one of the face value of dice.

The probability to get 5 on dice as face value = 1/6.

So, P(5) = 1/6

In picture we can see that there is total 4 space that are one blue and two yellow and one green space.

So the probability spinner land on blue space = 1/4

So, P(blue) = 1/4

Roll of dice and spin a spinner are two independent events as their outcomes do noy rely on each other.

Now the probability to get 5 and blue is given by,

= P(5 and blue)

= P(5)*P(blue)

= (1/6)*(1/4)

= 1/(6*4)

= 1/24

Hence the correct option is (B).

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Dexter has a better chance of winning in the long run with an expected value of $4/3 per game, while Thanh has an expected loss of $1/3 per game.

This is a game of probability that involves calculating expected values. Let's first calculate the probability of drawing a black chip:

Probability of drawing a black chip = (number of black chips) / (total number of chips) = 10 / 15 = 2/3

Similarly, the probability of drawing a white chip can be calculated as:

Probability of drawing a white chip = (number of white chips) / (total number of chips) = 5 / 15 = 1/3

Now, we can calculate the expected value of winning for each player.

For Dexter:

- If he draws a black chip, he will win $7 with probability 2/3

- If he draws a white chip, he will lose $10 with probability 1/3

Expected value of winning for Dexter = (7 x 2/3) + (-10 x 1/3) = 4/3

This means that on average, Dexter will win $4/3 per game.

For Thanh:

- If Dexter draws a black chip, Thanh will lose $7 with probability 2/3

- If Dexter draws a white chip, Thanh will win $10 with probability 1/3

Expected value of winning for Thanh = (-7 x 2/3) + (10 x 1/3) = 1/3

This means that on average, Thanh will win $1/3 per game.

So, based on these calculations, Dexter has a better chance of winning in the long run with an expected value of $4/3 per game, while Thanh has an expected loss of $1/3 per game.

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To find the critical numbers of h(x) = sin^2(x) + cos(x) in 0 < x < 2π steps are first to find the derivative h'(x), set h'(x) equal to zero and solve for x and check if solutions are within the given interval. The critical numbers are x = π, π/3, and 5π/3.

To find the critical numbers of the function h(x) = sin^2(x) + cos(x) in the interval 0 < x < 2π, we will follow these steps:

Find the derivative of the function, Set the derivative equal to zero and solve for x, Set h'(x) equal to zero and solve for x, Check if the solutions are within the given interval.
1: Differentiate h(x) with respect to x.
h'(x) = d(sin^2(x) + cos(x))/dx
Using chain rule, we get:
h'(x) = 2sin(x)cos(x) - sin(x)
2: Set h'(x) equal to zero and solve for x.
0 = 2sin(x)cos(x) - sin(x)
Factor out sin(x):
0 = sin(x)(2cos(x) - 1)
So, either sin(x) = 0 or 2cos(x) - 1 = 0.
3: Solve for x and check if the solutions are within the interval 0 < x < 2π.
For sin(x) = 0, x = π (since 0 < π < 2π).
For 2cos(x) - 1 = 0, cos(x) = 1/2.
x = π/3 and 5π/3 (since 0 < π/3 < 2π and 0 < 5π/3 < 2π).
Therefore, the critical numbers of the function h(x) = sin^2(x) + cos(x) in the interval 0 < x < 2π are x = π, π/3, and 5π/3.

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Walter can stay within his budget by dropping Fes (option ii).

Walter's original itinerary includes trips to Marrakech, Fes, Kenitra, and Oujda, which will cost him a total of 478 + 478 + 778 + 683 = MAD 2,417. This exceeds his budget of MAD 2,500.

Option i suggests replacing Kenitra with Tangier and Oujda with Casablanca, which will cost a total of 610 + 466 + 610 + 466 = MAD 2,152. However, this still exceeds Walter's budget.

Option iii suggests replacing Marrakech with Casablanca, which will cost a total of 965 + 466 + 778 + 683 = MAD 2,892, which is over Walter's budget.

Therefore, the only option that allows Walter to stay within his budget is to drop Fes from his itinerary, which will cost a total of 478 + 778 + 683 = MAD 1,939. This is well within his budget of MAD 2,500. So optio 2 is correct.

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They have total of 70 dolls together.

Let the initial number of dolls Jack had be 5x and the number Peter had be 2x.

After Jack gave Peter 15 dolls, their amounts became equal. So, we can write the equation: 5x - 15 = 2x + 15

Now, solve the equation for x: 5x - 2x = 15 + 15, which simplifies to 3x = 30

Divide both sides by 3: x = 10

Now, find the initial number of dolls they had: Jack had 5x = 5(10) = 50 dolls, and Peter had 2x = 2(10) = 20 dolls.

After Jack gave Peter 15 dolls, both had 35 dolls (50 - 15 = 35, and 20 + 15 = 35).

So, together they have 35 + 35 = 70 dolls.

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Answer:

bad photo quality

Step-by-step explanation:

The function is transformed by a vertical stretching or compression by a factor of 5, a horizontal shift of 6 units to the right, and a vertical shift of 2 units downward.

The transformation of a function may involve any change.

Usually, these can be shifted horizontally (by transforming inputs) or vertically (by transforming output), stretched (multiplying outputs or inputs), etc.

If the original function is y = f(x), assuming the horizontal axis is the input axis and the vertical is for outputs, then:

Horizontal shift (also called phase shift):

Left shift by c units: y=f(x+c) (same output, but c units earlier)

Right shift by c units: y=f(x-c)(same output, but c units late)

Vertical shift:

Up by d units: y = f(x) + d

Down by d units: y = f(x) - d

Stretching:

Vertical stretch by a factor k: y = k × f(x)

Horizontal stretch by a factor k: y = f(x/k)

Given data ,

Let the function be represented as f ( x )

Now , the value of f ( x ) is

In the given function y = 5/(x - 6) - 2, the values of a, h, and k can be identified as follows:

a = 5

h = 6

k = -2

Now , the original function is y = a/(x - h) + k, and the reciprocal family of this function is y = a/(x - h) + k

And , value of 'a' determines the vertical scaling factor of the reciprocal function

Now , the value of 'h' determines the horizontal shift of the reciprocal function. If 'h' is positive, the graph of the reciprocal function is shifted horizontally to the right

And , if 'k' is negative, the graph is shifted vertically downward

Hence , the transformation of the function is solved

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Connor will have $ 1975.4 if he invests $1,400 with a 9% interest rate that compounds annually for 4 years.

Compound interest is given by the formula:

A = P [tex](1 + \frac{r}{n})^{nt[/tex]

where A is the amount

P is the principal

r is the rate of interest

n is the frequency with the interest is compounded in a year

t is the time

P = $ 1,400

r = 9% or 0.09

t = 4 years

Since the interest is compounded annually the frequency of the compounding is 1.

n = 1

A = 1400 [tex](1 +\frac{0.09}{1})^{1*4[/tex]

= 1400 [tex](1.09)^4[/tex]

= 1400 * 1.411

= $ 1975.4

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If the motion of a point on the drum of a clothes dryer is modeled by the function y=12 sin (4/3π t) +20, the dryer rotates 40 times per minute.

The function y = 12 sin (4/3π t) + 20 models the vertical motion of a point on the drum of a clothes dryer. The amplitude of the function is 12, which represents the maximum displacement of the point from its rest position. The vertical shift of the function is 20, which represents the height of the point from the ground when the drum is at rest.

To determine the number of times the dryer rotates per minute, we need to find the period of the function, which is the time it takes for the function to complete one full cycle. The period of a sinusoidal function is given by the formula:

T = (2π) / b

where b is the coefficient of the t variable in the sine or cosine function.

In this case, b = (4/3)π, so the period of the function is:

T = (2π) / (4/3π) = 3/2 seconds

This means that the point on the drum completes one full cycle of vertical motion every 3/2 seconds. To convert this to rotations per minute, we need to find the number of cycles per minute:

cycles per minute = (60 seconds per minute) / (3/2 seconds per cycle) = 40 cycles per minute

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The student that correctly translates Mrs. Tucker's fraction into a percentage is Elvin and the percentage is  2.75%, under the condition that Mrs. Tucker writes the fraction 1 and tells her students to convert  the fraction into a percentage

Elvin's response is correct. Ferdinand's response is incorrect due to the application of multiplication of fraction by 100 and then added a percent sign.
Gertrude's response is incorrect due to the reason of  converting the fraction to a decimal and then multiplied by 100. nt sign to

Henrietta's response is incorrect due to the fact that she added a percepercentnt sign to the decimal equivalent of the fraction instead of multiplying it by 100.
Now To convert 1/36 to a percentage, we have to  first divide the numerator by the denominator:
1 / 36
= 0.0277777777778

Secondly , we have to  multiply the result by 100 to get the percentage
0.0277777777778 × 100
= 2.7778%

Then, the correct response is 2.75% which is the percentage equivalent of 1/36 given by Elvin.

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This is an example of an experiment. In an experiment, researchers manipulate the independent variable (in this case, the presence or absence of an electrical impulse) to determine its effect on the dependent variable (the number of repetitions the subjects can lift a weight).

The researcher randomly assigned subjects to either receive the electrical impulse or not, which is a key feature of experimental design.

By doing so, the researcher can ensure that any differences observed between the two groups are due to the manipulation of the independent variable, rather than any pre-existing differences between the groups.

In contrast, an observational study merely observes existing characteristics or behaviors of a population, without any manipulation or control of variables.

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