N x $5.06 = $506.00 how do I

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?

Aubrey read 29 books and eli read 52 books what number is equal to the number of books aubrey read?

Which expression is equivalent to -12(3x-3/4)