A square has a perimeter of 36 yd. What is the length of each side?

The length of each side is 9 yards

Step-by-step explanation:

The formula for the perimeter of a square is: 4s,where "s" is the side.

Since the perimeter is 36, we know that 4s = 36

Divide both sides by 4, S = 9

Therefore, each side of that square is 9 yards.

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15