A certain evergreen tree grows, on average, to a height of 21 feet. The height of the tree is given by h = 5t - 0.30t, where t is the age of the tree in years. a. Find the height of the tree when the tree is five years old. Round your answer to two decimal places.

Answer =
feet

b. Find the height of the tree when the tree is nine years old. Do not round your answer.

Answer =
feet

b. would be the answer : )

step-by-step explanation:

step 1: add -16x to both sides.

16x−4y+−16x=64+−16x  

−4y=−16x+64

step 2: divide both sides by -4.

−4y /-4 = -16x + 64/-4

answer:   y=4x−16

hope i'm right

y=3x+4

step-by-step explanation:

given the points a(0,4) and b(-4, -8)

eqn of line ab: (y-4)/(x-0)=(-8-4)/(-4-0)

(y-4)/x=-12/-4=3

y=3x+4

4+3x is the answer

hope you got it

the answer is a. 72. but i cant answer with less than 20 characters so here's some random text talking about it.