Tom buys a new phone service. It costs $20 to install, and then costs $15 a month. Write an equation to show the cost of the phone (y) for any number of months (x).

A. y= 15x+20

Step-by-step explanation:

since every month it charges you 15$, and you pay an initial fee of 20$, then the answer would be 20+15x = y

And if we rearrange it, it would give us y= 15x+20

problem:

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

f(5/2) = 10/3

i hope this !

$12. that is my answer.