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Mary swam nn laps during the week and 1010 laps over the weekend. Choose the expression that shows how many laps she swam in all.\newlineChoices:\newline(A) n10n - 10\newline(B) n+10n + 10\newline(C) nn\newline(D) 10n10 - n

Full solution

Q. Mary swam nn laps during the week and 1010 laps over the weekend. Choose the expression that shows how many laps she swam in all.\newlineChoices:\newline(A) n10n - 10\newline(B) n+10n + 10\newline(C) nn\newline(D) 10n10 - n
  1. Weekday laps swam: Mary swam nn laps during the week.
  2. Weekend laps swam: She swam 1010 more laps over the weekend.
  3. Total laps swam: To find the total, add the laps swam during the week to the laps swam over the weekend.\newlineSo, n+10n + 10.

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