Answer:
Question 9) c. -32y + 72
Question 10) B. 12 3/8 x + 9 1/3
Step-by-step explanation:
Question 9
-8(4y - 9)
First open the parenthesis
-8(4y - 9) = (-8×4y) - (-8×9)
= -32y + 72
Question 10
3(4x - 2/9) + 1/2(3/4x + 20)
The first thing is to open the parenthesis:
3(4x - 2/9) + 1/2(3/4x + 20) =12x - 6/9 + (3/8)x + 1/40
Put the like erms together
3(4x - 2/9) + 1/2(3/4x + 20) =12x - 6/9 + (3/8)x + 10
= 12x + (3/8)x - 6/9 + 10
= (99/8)x - 2/3 + 10
= (99/8)x - 28/3
= 12 3/8 x + 9 1/3
