Please help answering this. answer it correctly.

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?

Simplify 24÷(-2)(3)+7 a. -29 b. 3 c. 11

Keith runs 5 miles in 38 minutes. at the same rate, how many miles would he run in 57 minutes