I missed a whole lesson plz explain

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

Siri can type 90 words in 40 minutes about how many words would you expect her to type in 10 minutes at this rate

If the angle bisectors of a pair of opposite angles of a quadrilateral are the opposite sides of a parallelogram formed by the two angle bisectors and two sides of the quadrilateral, is the quadrilateral always a parallelogram? explain your answer.