Remember that the area of a rectangle is the length of the rectangle multiplied by the width of the rectangle.
In this case, we could say (where
is the area of the rectangle):
![A(x) = L(x) \cdot W(x)](https://tex.z-dn.net/?f=A%28x%29%20%3D%20L%28x%29%20%5Ccdot%20W%28x%29)
Substituting the values the problem gave us for
and
, we can find the formula for
in terms of
, which is:
![A(x) = (5x) \cdot (2x^2 - 4x + 13) = (10x^3 - 20x^2 + 65x)](https://tex.z-dn.net/?f=A%28x%29%20%3D%20%285x%29%20%5Ccdot%20%282x%5E2%20-%204x%20%2B%2013%29%20%3D%20%2810x%5E3%20-%2020x%5E2%20%2B%2065x%29)
The formula for the area of the rectangle would be A(x) = 10x³ - 20x² + 65x.
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Sara needs to collect 1200 signatures.
Step-by-step explanation:
Let,
x be the total number of signatures she needs to collect
Given percentage = 36%
Signature collected = 432
According of statement;
36% of x = 432
![\frac{36}{100}*x=432\\](https://tex.z-dn.net/?f=%5Cfrac%7B36%7D%7B100%7D%2Ax%3D432%5C%5C)
![\frac{36x}{100}=432\\Multiplying\ both\ sides\ by 100\\100*\frac{36x}{100}=432*100\\36x=43200\\Dividing\ both\ sides\ by\ 36\\\frac{36x}{36}=\frac{43200}{36}\\x=1200](https://tex.z-dn.net/?f=%5Cfrac%7B36x%7D%7B100%7D%3D432%5C%5CMultiplying%5C%20both%5C%20sides%5C%20by%20100%5C%5C100%2A%5Cfrac%7B36x%7D%7B100%7D%3D432%2A100%5C%5C36x%3D43200%5C%5CDividing%5C%20both%5C%20sides%5C%20by%5C%2036%5C%5C%5Cfrac%7B36x%7D%7B36%7D%3D%5Cfrac%7B43200%7D%7B36%7D%5C%5Cx%3D1200)
Sara needs to collect 1200 signatures.
Keywords: Percentage, Division
Learn more about percentages at:
#LearnwithBrainly
The answer is A,
if you plug in the points of (2,-5) into
y=x-7
-5=2-7
-5=-5
so the equation is true