Answer:
It has to be 4-7
Step-by-step explanation:
The formula of the perimeter of a triangle is

where a,b,c are the sides of the triangle
Answer:
-48
Step-by-step explanation:
you put the -6 in the place of a, and put 7 in the place of x. you get -6-6x7. 6x7 is 42. -6-42 is -48.