Explain why a change from 20 to 40 is 100% increase, but a change from 40 to 20 is a 50% decrease.

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125

Which is f(5) for the function –2x2 + 2x - 3?

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 4x^2 - 19x- 5