I’m just trying to pass my sophomore !

a)

Lets p = # of fruit pies sold and j = # of bottles of fruit juice sold

Together both classes sold 79 items: p + j = 79

Fruit pie sold sold $1.65 each and bottle of fruit juice sold $1.36 each and together earned $118.17 = 1.65p + 1.36j = 118.17

Now you have two equations

p + j = 79 --> p = 79 - j

1.65p + 1.36j = 118.17

Substitute p = 79 - j into 1.65p + 1.36j = 118.17

1.65(79 - j) + 1.36j = 118.17

130.35 - 1.65j + 1.36j = 118.17

- 0.29j = - 12.18

j = 42

Substitue j = 42 into p = 79 - j

p = 79 - j = 79 - 42 = 37

# of fruit pies sold = 42 and # of bottles of fruit juice sold = 37

b)

Mr. Sanchez's class : $1.65 (37) = $61.05

Mr. Kelly's class: $1.36 (42) = $57.12

Mr. Sanchez's class sold more money than Mr. Kelly's class.

c)

$61.05 - $57.12 = $3.93

Mr. Sanchez's class earned $3.93 more than Mr. Kelly's class

$12. that is my answer.