Respuesta :

Answer:

Step-by-step explanation:

8.  32 / y = 3(y - 4)

11.  Perimeter of pentagon = 5L

12.  Area of circle = π r²

13.  surface area of sphere = 4πr²

21. f - 5g = 25 - f

22.  3b - 100 = 6b

23.  4 x (14 + c) ²