You received a discount on each book you buy . the original price of each book is x dollars you buy 5 books for a total of (5x - 15) dollars factor the expression using gcf

Anyone know? is appreciated! will mark brainliest if correct!

The focus of parabola is (-4, -5), and its directrix is y= -1. fill in the missing terms and signs in parabolas equation in standard form

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)