Answer:
1) Marcus 2) Lillian 3) Pablo
Step-by-step explanation:
For these type of expressions you have to use "PEMDAS"
Parentheses
Exponents
Multiplication
Division
Addition
Subtraction
(IT ALWAYS HAS TO GO FROM LEFT TO RIGHT)
1) Marcus Why Marcus?
Because, Melanie added instead of dividing first.
Melanie: Marcus:
8 x 7 + 14 / 7 8 x 7 + 14 / 7
56 + 14 / 7 56 + 14 / 7
70 / 7 56 + 2 <---
10 58
2) Lillian Why Lillian?
Because, Landon Multiplied instead of dividing.
Lillian: Landon:
50 / ([tex]5^{2}[/tex] - 15) x 5 50 / ([tex]5^{2}[/tex] - 15) x 5
50 / (10) - 5 50 / (10) - 5
5 x 5 50 / 50 <---
25 1
3) Pablo Why Pablo?
Because, Pamela didn't follow the L --> R- (Left to Right) -Rule.
Pablo: Pamela:
(12 + [tex]2^{2}[/tex]) / 4 x 5 (12 + [tex]2^{2}[/tex]) / 4 x 5
([tex]14^{2}[/tex]) / 4 x 5 (12 + 4) / 4 x 5 <---
196 / 4 x 5 16 / 4 x 5
49 x 5 4 x 5
245 20
