A repair service charges by the hour. The amount of money they charge is below. What equation does the repair service use to charge customers
A) c=30h + 70
B) c=40h
C) c=40h + 30
D) c= 30h +40

What is the solution of the systems of equations? y=2/3x+3 x=-2

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?

Satchi found a used bookstore that sells pre-owned dvds and cds. dvds cost $9 each, and cds cost $7 each. satchi can spend no more than $45.