If a+b = -2 and x + y = -2 , what is 4x + 5a + 4y +5b

Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3