Question

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? He should have made x equal 54 and y equal 71. He should have added the values in the numerator before dividing by 2. He should have divided the 71 by 2 instead of the 27. He should have made the numerator 76 59.

Answer 1

Answer:

Its B ^^

Step-by-step explanation:

Answer 2

He should have added the values in the numerator before dividing by 2.

Given

Justin’s doctor said that the expression;

Expression;$\rm \dfrac{x+y+5}{2}$

Where x and y are his parents’ current heights in inches.

Mom’s height = 54 inches Dad’s height = 71 inches.

Substitute all the values in the equation;

$\rm= \dfrac{x+y+5}{2} =\\\\=\dfrac{71+54+5}{2} \\\\= \dfrac{130}{2}\\\\= 65$

Hence, He should have added the values in the numerator before dividing by 2.

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