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We are asked to find which expression represents the description "twice the quantity m plus n".
[tex]\triangle~\fbox{\bf{KEY:}}[/tex]
First, add m and n:
[tex]\star~\large\pmb{m+n}[/tex]
Now, multiply two times this sum:
[tex]\star~\large\pmb{2(m+n)}[/tex]
See, the parentheses around the sum show that we multiply two times both m and n.
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Answer:
2(m + n)
Step-by-step explanation:
The words describe a quantity. "Twice" means two-times the previous amount. m and n are the unknown numbers that are being added, so you must put them in parentheses to indicate that they should be added first.
