Imissed a test and this is my study guide don't understand any of it also number 10 doesn't have any of the right answers so you need to figure it out on your own if, me someone

Aretha wanted to gather data about the cost of local bowling leagues in her area. she plotted the data and determined that the average bowling league costs consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. identify and interpret the y-intercept in this model. the y-intercept is 20. this is the cost per month. the y-intercept is 20. this is the cost of registration. the y-intercept is 15. this is the cost of registration. the y-intercept is 15. this is the cost per month.

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b

Given the net of the rectangular prism, what is its surface area?