# A tower has a triangular base with side lengths 6y ft, 7y + 2 ft, and 5x – 7 ft. How do you write a simplified expression for its perimeter?

##### 1 Answer

Jan 10, 2016

13y + 5x - 5

#### Explanation:

to find the perimeter of a shape add all the lengths of the sides together.

adding lengths of 3 sides : 6y +7y + 2 + 5x - 7 .

collecting 'like terms' together to obtain

Perimeter = 13y + 5x - 5