PLEASE HELP what is (38^5)^2 as a single power

what is 20^6 divided by 20^3 as a single power?

Find an equation for the linear function which has slope -10 and x-intercept -7

Give me the equations of two lines that have the same slope but are not parallel.

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?