Question

The expression 9n + 1 represents the perimeter (in meters) of

the triangle. Write an expression in simplest form that represents the measure of the third side.

Answer 1

The expression 9n + 1 represents the perimeter

sum of the sides of the triangle, equal to the perimeter:

x + 3n+2 + 2n-1 = 9n + 1

x + 5n + 1 = 9n + 1

x = 9n +1 - 5n -1

Answer: x= 4n