Kay drops a ball from 5 feet. The height of Kay’s ball can be represented by -16t2+5 after t seconds. At the same time, Sam throws a ball upward. The height of Sam’s ball can be represented by -16t2+24t+3 after t seconds.

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