The perimeter of a square is represented by the expression 80y – 16. which expression represents the length of a side? 20y – 4 40y – 8 80y – 4 20y – 16

A

Step-by-step explanation:

PLZ MARK BRAINLIEST

So side of the square is given by first expression that is 20y-4.

Step-by-step explanation:

The formula for perimeter of square with side x is given by:

We are given perimeter as 80y-16.

So plugging the value of the perimeter in the formula to find the side of square ,

Dividing both sides by 4,

x=20y-4

So side of the square is given by first expression that is 20y-4.

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15