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15 votes
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 should have multiplied 12.5 and 7.9 first.
Justin should have added 12.5 and 7.9 first.
Justin should have multiplied 3.8 and 7.9 first.
Justin should have added 3.8 and 7.9 first.

2 Answers

9 votes

Answer:Justin should have multiplied 3.8 and 7.9 first

Explanation:

User SudarakaR
by
4.6k points
4 votes

Answer:

Justin should have multiplied 3.8 and 7.9 first

Explanation:

Multiply before adding

12.5 +3.8(x)x

12.5+3.8x7.9

User Barrylachapelle
by
4.4k points