Hi student, let me help you out! :)
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We are asked to write "8 times the sum of 2 and 15" as an algebraic expression.

So, we add 2 and 15:

Now we multiply 8 times this expression:

Hope it helps you out! :D
Ask in comments if any queries arise.
#StudyWithBrainly
~Just a smiley person helping fellow students :)