Help Please!! What is A + matrix B?

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.

Ebert used to make $22 an hour, but got a 10% raise. how much more will he make in a 40 hour work week with raise?

⦁plzzz me asap worth 30 points. part b: find the area of just the wood portion of the frame. this is called a composite figure. explain and show your work.