Quick question guys.

Solve the system of equations. y= 2x y= x^2 - 15

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.

In a sale there is 25% of all prices a chair costs £45 in sale how much was it before the sale