Answer:
b.
Step-by-step explanation:
The given equation is;
Cross multiply;
Expand;
Divide through by 6;
Substitute;
Square both sides;
Simplify;
Sides are x and x + 3.5 cm
Perimeter = 2(x + (x + 3.5))cm
4x +7 = 67
x = 15cm Answer
HOPE THIS HELPED!