A home gardener estimates that 16 apple trees will produce an average yield of 80 apples per tree. Because of the size of the garden, for each additional tree planted, the yield will decrease by 4 apples per tree. How many trees should be planted to maximize the total yield of apples?

are ya tryin to ask something or is this a statement

if y=4x then you will substitute 4x in for y in the second equation.

8x + 4x = 18 combine like terms

12x = 18 divide by 12 on both sides

x = 18/12 or 3/2

now replace x in the first equation with 3/2 to get

y = 4 3/2

y = 6

the answer is a

(3/2,6)

hope that .

brainliest is always apprectiated