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.

Justin should have multiplied 3.8 and 7.9 first.

Step-by-step explanation:

The equation that was given with regards to the question is 12.5 + 7.9x and we are told that the value of x = 3.8

The error made by Justin was that he didn't multiply 3.8 and 7.9 at first. Solving the equation will be:

= 12.5 + 7.9x = 12.5 + 7.9(3.8)

= 12.5 + 30.02

= 42.52

-14

step-by-step explanation:

2x2 – 2(x+4)

=2x2-2（5+4）

=4-2×9

=4-18

=-14

m a t h w a y. c o m

step-by-step explanation: