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Alika [10]
3 years ago
10

Which math expression represents the phrase?

Mathematics
1 answer:
fiasKO [112]3 years ago
5 0
"The sum of a number and 7"
Sum implies addition.
We would write this part as <em>n + 7</em>.

Then we would write the "9 times" part in like this:
<em>9 </em><em>·</em><em> </em><em>(n + 7)</em><em>
</em>We can't write just 9 · n + 7 without the parentheses, because then we would be multiplying just 9 and n instead of 9 and the sum of n and 7. (order of operations says we must do multiplication first)
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