Answer:
P = 17in
Step-by-step explanation:
P = side + side + side
P = 5 + 5 +7
y=-3x+20
3/4x+1/4y=5
-3/4x -3/4x
1/4y=5-3/4x
divide the whole entire equation by 1/4 like this: (4)1/4y=4(5-3/4x)
Your answer is y=-3x+20
207°