Cam buys 3 cds for $26.77. if each cd costs the same amount about how much does each cd cost?

What is a rational number between 9.5 and 9.7

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.

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?