Ara bought 30 books at a yard sale. she now has 220 books. which equation can be solved to find b, the number of books tara had before the yard sale?

The function y= x - 4x+ 5 approximates the height, y, of a bird, and its horizontal distance, x, as it flies from one fence post to another. all distances are in feet. complete the square to find and interpret the extreme value (vertex). select two answers: one extreme value and one interpretation.