Please help Combine like terms to find the equivalent expression of 5 y minus 3 y + 12.

The new expression becomes
8 y + 12.
Negative 2 y + 12.
2 y + 12.
14 y.

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?

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

Two numbers have a sum of -19. one number is x. what expression represents the other number?