Which of the shaded parts represents 4/5 of a set?

a) 15/20 = 3/4

b) 12/20 = 3/5

c) 12/15 = 4/5

d) 10/15 = 2/3

So. It must be answer c).

8(-10x+3.5y-7)

8×-10x + 8×3.5y + 8×-7

-80x + 28y - 56

therefore

-80x+28y-56 is the correct answer

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.