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Christine had already knitted 1515 rows of a scarf. She knitted rr more rows over the weekend. Choose the expression that shows the number of rows Christine has knitted in all.\newlineChoices:\newline(A) 15−r15 - r\newline(B) r−15r - 15\newline(C) 15+r15 + r\newline(D) 1515

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Q. Christine had already knitted 1515 rows of a scarf. She knitted rr more rows over the weekend. Choose the expression that shows the number of rows Christine has knitted in all.\newlineChoices:\newline(A) 15−r15 - r\newline(B) r−15r - 15\newline(C) 15+r15 + r\newline(D) 1515
  1. Start with 1515 rows: Christine started with 1515 rows, then knitted rr more.\newlineTo find the total, add rr to 1515.\newlineCalculation: 15+r15 + r
  2. Calculate total by adding rr: Check the choices to find the matching expression.\newlineCorrect expression: (C) 15+r15 + r

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