What is 38.86 rounded to one decimal place

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

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?

What is the answer to the question 5x+2x