The equation that represents the total money (m) that liam earns from selling all the fruit from his trees is m=90x+120y.

what combination of trees allows liam to maximize his income?

a.) if liam plants 11 apple trees and 0 cherry trees, he will have a maximum income of $990.
b.) if liam plants 5 apple trees and 4 cherry trees, he will have a maximum income of $960.
c.) if liam plants 7 apple trees and 0 cherry trees, he will have a maximum income of $630.
d.) if liam plants 0 apple trees and 10 cherry trees, he will have a maximum income of $1200.
e.) if liam plants 4 apple trees and 5 cherry trees, he will have a maximum income of $960.
f.) if liam plants 0 apple trees and 7 cherry trees, he will have a maximum income of $840.