Simplify:

7.2 (2.8r-4.5s) + 9.34r-1.25s

A.) 29.5r - 33.65s

B.) 10.82r + 31.15s

C.) 10.82r - 31.15s

D.) 29.5r + 33.65s

First, distribute the 7.2 across the 2.8r and - 4.5s.

7.2 (2.8r - 4.5s) + 9.34r - 1.25s = 20.16r - 32.4s + 9.34r - 1.25s

Combine like terms.

That means if we have a term with the same variable then as another variable, we can add/subtract them together.

20.16r - 32.4s + 9.34r - 1.25s = 29.5r - 31.15s

So, the answer to this question is 29.5r - 31.15s.