How do i convert 25 miles into inches, seconds and minutes.

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

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?