Mathematics: Suppose that a rectangle has a perimeter of 24 meters. express the area a(x) of the rectangle in terms of the length x of one of its sides. a(x) = ? ?

Suppose that a rectangle has a perimeter of 24

Ответ:

xdimplesjoon

31.12.2021

$x-\ length\\\\y-\ width\\\\
A(x)=xy\\\\
Perimeter=2x+2y\\
24=2x+2y\ \ \ |Subtract\ 2x\\
24-2x=2y\ \ \ |Divide\ by\ 2\\
y=\frac{24-2x}{2}=12-x\\\\
A(x)=x(12-x)=12x-x^2\\\\
Area\ of\ rectngle\ can\ be\ expressed\ as\ A(x)=-x^2+12x$

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Ответ:

morrisjillian23

28.08.2021

Mathematics

https://www.recipetips.com/kitchen-tips/t--1615/how-much-frosting.asp

Step-by-step explanation:

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