Solve the pair of simultaneous equation 2x - y=5 ,x + y=4 and 2x +2y =20 ,2x -2y =80​

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document

Joey is asked to name a quadrilateral that is also a rhombus and has 2 pairs of parallel sides.should be his answer