maths
posted by sophie .
i have got to find the perimeter of a triangle that has one side of 8x7w another that says 3x+9y and then another that says 3y+5w
whats the perimeter of the triangle ??? please help

P = a + b + c
add the three sides
P = 8x  7w + 3x + 9y + 3y + 5w
combine like terms