Question

Someone please answer this I really need help!

Explain how to use properties to prove d + (8d + 1) + 7 is equivalent to 8 + 9d.

Answer 1

I'm not quite sure if this is correct but

d = 1
8d +d = 9d

the you have 1 and 7 + 1 = 8

hope this helps :)

Answer 2

Explanation:

Sample Response: Use the associative property to move the parentheses, and the expression becomes (d + 8d) + 1 + 7. Combine like terms, and the expression becomes 9d +8. Use the commutative property to change the order of the terms, and the expression becomes 8 + 9d.