4x + 3y = -2
8x – 2y = 12

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

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"

An equation in slope-intersept form the lines that passes thought (-8,1) and is perpindicular to the y=2x-17.