Write a linear expression in simplest form to represent the perimeter of the triangle at the right. then find the perimeter if the value of x is 10 millimeters. the triangles side = (7x + 8)mm (6x +6)mm (9x - 4)mm thanks and if you can pls explain

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

the answer is 2/54

step-by-step explanation: