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blsea [12.9K]
3 years ago
14

Which expression is equivalent to (3b + 2r) + (4b + r)?

Mathematics
2 answers:
marysya [2.9K]3 years ago
6 0
(3b+2r)+(4b+r)=3b+4b+2r+r=7b+3r. B. 7b+3r
lozanna [386]3 years ago
4 0
To do this problem, you need to first get rid of all the parenthesis. Since all the operations are addition (+), remember the <span>Associative Property of Addition. This property says when you're adding, it doesn't matter where you put the parentheses because it'll all add up to the same thing.

That means </span>(3b + 2r) + (4b + r) = (3b + 4b) + (2r + r), or even, just get rid of the paratheses in general and have (3b + 2r) + (4b + r) = (3b + 2r + 4b + r).

Either way, now you can add like terms so: 
(3b + 2r) + (4b + r) = (3b + 4b) + (2r + r) = 7b + 3r

Your answer is B) <span>7b + 3r</span>
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