1. Simplify by combining like terms and then evaluate for x = 2 and y=-1 a) x + 2x - 6
b) 6x – 5x-x+8y

Solve with work both bert and ernie received an increase in their weekly salaries. bert's salary increased from $520 to $520. ernie's salary went from $580 to $645. find the percent of increase for each salary. what was the larger of the two percents ?

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?