Sarita bought an MP3 player on sale for 30% off the regular price. Sarita also had a coupon which offered an additional $10.00 off the sale price. If the regular price of the MP3 player was $75.00, what was the final sale price of the MP3 player before tax?

An incoming airplane is x miles due north from the control tower at an airport. a second incoming airplane is y miles due east of the same control tower. the shortest distance between the two airplanes is z miles. which of the following functions would best model the situation above?