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Mathematics, 20.02.2021 02:40 zibnmustafah

Justin’s doctor said that the expression StartFraction x + y + 5 over 2 EndFraction, where x and y are his parents’ current heights in inches, gives an estimate of how tall Justin will be as an adult. Justin’s work evaluating the formula is shown below. Mom’s height = 54 inches
Dad’s height = 71 inches

StartFraction 71 + 54 + 5 over 2 EndFraction = 71 + 27 + 5 = 103 inches

What error did Justin make?

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