Subtract 3a(a + b + c) – 2b(a – b + c) from 4c(–a + b + c). Please answer and tell how to solve it, I know how the letters represent numbers, but there is no other info, and i dont get how you are supposed to add or subtract letters.

Josh has a rewards card for a movie theater he receives 15 points for becoming a rewards card holder he earns 3.5 points for each visit to the movie theater he needs at least 55 points to earn a free movie ticket which inequality can josh use to determine x, the minimum number of visits he needs to earn his first free movie ticket.

Suppose y varies directly with x. write a direct variation equation that relates x and y. then find the value of y when x=12 y=7 when x=3

If i purchase a product for $79.99 and two accessories for 9.99 and 7.00 how much will i owe after taxes applies 8.75%