Answer:
6x-9
Step-by-step explanation:
To find the perimeter of the triangle, add up all the sides
.3x +24 + (5x) + (.2x -15) = perimeter
Combine like terms
.3x+5x + .2x + (24-15)
6x +9 = perimeter of the triangle
The expression for the perimeter of the triangle is 6x-9
