cb4051597 cb4051597 26-09-2021 Mathematics contestada Which expression represents the phrase, "One-third the sum of 12 and a number? a.) 1 /3 ( 12 ) + x b.) 1 / 3x + 12 c.) 1 / 3 + 12 + x d.) 1 / 3 ( 12 + x )