What is the solution to the system of equations below? y=1/2x-4 and y=-2x-9 a) (-2,-5) b) (-2,-3) c) (2, -3) d (2,-13)

Ineed with 14, 16, 28 and 36 me. we didn't go over them in class so i don't know what to do.

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

Look at arnold's attempt to solve the equation for b: 3b = 12 b = 3 · 12 b = 36 describe the mistake that arnold made.