What answer choice is this and step by step explanation?

2.5/yr

Step-by-step explanation:

Every year the height of the tree goes up by 2.5 ft.

You can tell that by doing this

12-9.5=2.5

9.5-7= 2.5

7-4.5= 2.5

I hope this helps! tell me if I need to explain more!

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!

ou would have 12 of each