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.

answer 1 : option "c"

answer 2 : option "d"

answer 3 : option "b"

answer 4 : option "d"

answer 5 : option "b"

answer 6 : option "a"

answer 7 : option "c"

answer 8 : option "d"

answer 9 : option "c"

answer 10 : option "d"

answer 11 : option "c"

answer 12 option "b"

answer 13 option "c"

answer 14 option "c"

answer 15 option "d"

answer 16 option "a"

answer 17 option "b"

answer 18 option "c"

answer 19 option "a"

answer 20 option "a"

answer 21 option "c"

d