What is the y-intercept of the function?

f(x) = -0.2x2 +0.4x - 0.8

The area of a rectangle is 54x^9y^8 square yards. if the length of the rectangle is 6x^3y^4 yards, which expression represents the width of the rectangle in yards

You are riding your bike and notice the square sign above. you mentally draw a straight line from point a to c. describe the angle relationship between dca and bca

An isosceles trapezoid was broken into a rectangle and two triangles. what are the base and height of one of the triangles?