Answer:
a). 4 + 9x + 17 + 15x
b) 21 + 24x
Step-by-step explanation:
Here, we want to write expressions for the perimeter
Mathematically, this is the sum of the length of the sides
We have this as
a)
4 + 9x + 17 + 15x
b) = 4 + 17 + 9x + 15x = 21 + 24x
