Question

A triangle has side lengths of (7x-4) centimeters, (x+3) centimeters, and (3y+2)centimeters.Which expression represents the perimeter, in centimeters, of the triangle

Answer 1

Finding the perimeter, you have to add the individual expressions together. Split the expressions into like terms, in this case they are

7x, x

-4, 3, 2

3y

Adding the like terms together gives this:

8x

1

3y

Now just string them together:

8x+3y+1