Question

Write an equivalent expression by distributing the "-−" sign outside the parentheses:

8.9r-(-5s-10)

Answer 1

8.9r + (5s + 10)

actually the parenthesis aren't necessary...

8.9r + 5s + 10

Explanation:

You can change a subtraction to addition if you change the second term to the opposite sign. This problem is like advanced mode of "Add the Opposite"

8.9r - (-5s - 10)

= 8.9r + (+5s + 10)

= 8.9r + (5s + 10)

= 8.9r + 5s + 10