If the length of a rectangle is 5y-7 and the width is 3y, represent the area of the rectangle

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.

Find the missing dimension! need asap! tiny square is a =3025 in ²

Ithink i know it but i want to be sure so can you me out ?