An equilateral is a 3-sided plygon in which all sides have the same length. write a formula for the perimeter, p, of an equilateral triangle whos perimeter is 72 inches.

Lets a = side

A formula for the perimeter, P, of an equilateral triangle whos perimeter is 72 inches

P = 3a

72 = 3a

or

3a = 72

answer

3a = 72

y=−9/2x+10

step-by-step explanation:

let's solve for y.

0−9x−2y=−20

step 1: add 9x to both sides.

−9x−2y+9x=−20+9x

−2y=9x−20

step 2: divide both sides by -2.

−2y

−2

=

9x−20

−2

y=

−9

2

x+10

7

step-by-step explanation: