Question

The perimeter of a triangle is given by the formula P = a + b + c. Solved for b, this formula becomes b =

A) P + a + c
B) P - a - c
C) P + a - c
D) P - a + c

Answer 1

The answer is B. Leave the b on one side and move the a and c to the side with the P. When you move them over they both become negative.