Solve the following system of equations graphically on the set of axes below. Y = x+4 y=-1/2x-8
Plot two lines by clicking the graph.

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

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

Carley bought a jacket that was discounted 10% off the original price. the expression below represents the discounted price in dollars, based on x, the original price of the jacket.