Answer:
They are b and c.
Step-by-step explanation:
Let's simplify each expression:
a. b+2 (b+2b)
= b + 2b + 4b = 7b.
b. 3b + b = 4b.
c. 2(2b) = 2 * 2b = 4b.
(x- 5)(x - 3)
x(x - 3) -5(x - 3)
x^2 - 3x - 5x + 15
x^2 - 8x + 15
62.5 I think