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Justin is evaluating the expression 12.5 + 3.8 x, when x is 7.9. 12.5 + 3.8 (7.9). 16.3 (7.9). 128.77. What was Justin’s error?

Justin is evaluating the expression 12.5 + 3.8 x, when x is 7.9. 12.5 + 3.8 (7.9). 16.3 (7.9). 128.77. What was Justin’s error?
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1 vote
Justin is evaluating the expression 12.5 + 3.8 x, when x is 7.9.

12.5 + 3.8 (7.9). 16.3 (7.9). 128.77.

What was Justin’s error?

asked
User Artur Zagretdinov
by
7.7k points

1 Answer

2 votes
PEMDAS
He should have multiplied before adding
12.5 + 3.8(7.9)
12.5 + 30.02
42.52
answered
User Anupam Roy
by
7.5k points
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