Anonymous Anonymous

23-01-2017
Mathematics

Answered

Which expression represents the sum of 21 and an unknown number?

A21-d

B21+d

C21÷d

D.21d

Verified Answer :

Anonymous Anonymous

23-01-2017

BThe variable d represents an unknown number. So, 21+d, is equal to 21+an unknown number.

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zombiezslayerz77 zombiezslayerz77

23-01-2017

the answer is B because it says sum. sum means addition.

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