The number of rock mp3 is 3 times more then the number of classical. Let c represent the number of classical mp3. Write an expression for the number of rock mp3

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 arc length of the semicircle. 7the grade

Write the equation in general quadratic form: plz !