Abcd is a quadrilateral with ad=bc, ab=40, cd=20, and angle a plus angle b equals 90­°. what is the area of quadrilateral abcd? hint: consider how copies of abcd can be constructed into another shape.

Find parametric equations for the line tangent to the curve of intersection of the surfaces at the given point. surfaces: xsquared2plus+2yplus+2zequals=1212 yequals=33 point: left parenthesis 1 comma 3 comma five halves right parenthesis

What is the factored form of the following expressions? d^2 – 13d + 36

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2