Evaluate each expression for the given values of the variables: 4|a| +8–a, if a=–2

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

Write the expression in simplified radical form. show all steps and work including any foil method work. (hint: use the conjugate. no decimal answers.) (9-2√3)/(12+√3)

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.