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Peter had already finished mm of his math problems. Then he finished 77 more problems. Choose the expression that shows the number of problems Peter has finished.\newlineChoices:\newline(A) 77\newline(B) 7−m7 - m\newline(C) m+7m + 7\newline(D) m−7m - 7

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Q. Peter had already finished mm of his math problems. Then he finished 77 more problems. Choose the expression that shows the number of problems Peter has finished.\newlineChoices:\newline(A) 77\newline(B) 7−m7 - m\newline(C) m+7m + 7\newline(D) m−7m - 7
  1. Start with mm: Peter already did mm problems, so we start with mm.
  2. Add 77 to mm: Then he did 77 more, so we add 77 to mm.
  3. Total problems finished: The expression for the total problems Peter finished is m+7m + 7.

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