Given that f(x) = x - 2 and g(x) = x2 - x, find (f+g)(4), if it exists. Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. (f+g)(4) =?
(Simplify your answer.)
B. The value for (f+9)(4) does not exist.

Solve the system of equations. y= 2x y= x^2 - 15

Can someone me out here number 4 plz

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?