Answer:
Step-by-step explanation:
If
then
by combining like terms. (I'm thinking you might have mistyped the problem because this representation is weird).

Because there nobody that teaches them how to do math
It’s prime because none of the other answers work.
27$ because you do 20*15*12 then 3600*0.09 and divide that answer by 12 which is 27
Marcy bought a total of 22.8 potatoes. 10.32+12.48=22.8