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Klio2033 [76]
3 years ago
12

Help with a math problem

Mathematics
2 answers:
Makovka662 [10]3 years ago
6 0

Answer:

<u>Part A:</u><u> </u>Draw a model for the ratio of panels to the money that she will save.

Let the number of panels = y

And the money that she will save = x

For every 2 panels, she will save $60.

2x = 60y

x = 30y

See the attached figure which represents the model.

===============================================

<u>Part B:</u> Write the ratio of panels to Money saved

Panels to money = \frac{panels}{money} = \frac{y}{x} =\frac{2}{60} =\frac{1}{30} = 1 : 30

Nimfa-mama [501]3 years ago
3 0

Answer:

For B the answer is 1 : 30.  For A the graph is Y goes up 2 for every 60 on the X.

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Alecsey [184]
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3 0
3 years ago
Help me ):
slavikrds [6]
For the carpet:

Given:

Area = x^2 + x - 20 ft^2
Length = x+ 5 ft

As a carpet is rectangular, the area is defined as the product of the length and the width. To obtain an expression of the carpet's width, the area is to be divided by the length, which is shown below:

         __x_-_4___x + 5|x^2 + x - 20         x^2 + 5x         --------          -4x - 20          -4x - 20             --------                    0

Therefore, the expression of width = x - 4.

Applying the value of x = 20 to obtain the measurements of the carpet, we obtain the following:

Width = x - 4 = 20 - 4 = 16ft
Length = x+ 5 = 20 + 5 = 25ft.

Therefore, the carpet is 25ft x 16ft.

For the wall:

The same principles apply to the wall as it is also assumed to be rectangular.

Given:
Area = <span>x^2 + 17x + 30 ft^2
Width = x + 2

To obtain the expression for the wall's length, Area is to be divided by the Width, which is shown below:

         __x_+_15______x + 2|x^2 + 17x + 30         x^2 + 2x          --------                  15x + 30                  15x + 30                   ---------                             0

Therefore, the expression for the wall's length is x + 15.

Applying the value of x = 20 to obtain the wall's dimensions:

Length = x + 15 = 20 + 15 = 35ft.
Width = x + 2 = 20 + 2 = 22ft.

Therefore the wall has measurements of 35ft x 22ft.</span>
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After the price of a CD player had been reduced to 1/4 of its original price, it was sold for $48. What was the original price?
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Consider the following function. f(x) = 9 − x2/3 Find f(−27) and f(27). f(−27) = f(27) = Find all values c in (−27, 27) such tha
oksano4ka [1.4K]

I guess the function is f(x)=9-x^{2/3}. Then f(-27)=0 and f(27)=0.

The derivative is f'(x)=-\dfrac23 x^{-1/3}, but there is no c such that

-\dfrac23c^{-1/3}=0

This doesn't contradict Rolle's theorem because f'(0) does not exists. In other words, f is not differentiable on (-27, 27), so the conditions of Rolle's theorem are not met. (Looks like that would be the last option, or the second to last option if the last one is "Nothing can be concluded")

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