Which of the following is the simplest form of the expression $5 (2 + 3 m + 4 m) ?$

10 + 20 m

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5 + 7 m

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10 + 7 m

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10 + 35 m

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Solution

The correct option is D $10 + 35 m$
First, we add the like terms.
$3 m + 4 m = 7 m$
Then, the expression reduces to $5 (2 + 7 m)$ .
Multiplying each term in the parentheses by 5 we get,
$5 \times 2 + 5 \times 7 m = 10 + 35 m$
So, option C is correct.

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