To which sets does -5/8 belong? natural numbers real numbers irrational numbers whole numbers rational numbers integers

20 solve 2(4 x + 3) < 5 x + 21. a) { x | x < 9} b) { x | x > -5} c) { x | x > -9} d) { x | x < 5}

Tom can paint the fence in 12 hours, but if he works together with a friend they can finish the job in 8 hours. how long would it take for his friend to paint this fence alone?

How do you do the foil method with polynomials?