Need asap an equilateral triangle is shownwhat is the perimiter

C   9x^2 +15x +36

Step-by-step explanation:

Equilateral triangles have the same angles and the same length sides.

All the sides of the triangle have the length 3x^2+5x+12

The perimeter will be 3s  since the sides are the same

P=3s

P =3(3x^2+5x+12)

Distribute

P = 9x^2 +15x +36

y=3x+4

step-by-step explanation:

given the points a(0,4) and b(-4, -8)

eqn of line ab: (y-4)/(x-0)=(-8-4)/(-4-0)

(y-4)/x=-12/-4=3

y=3x+4