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.
