You sign up for karate classes. The classes cost
, 80 per month.
Write an equation for the number of dollars, d
, that you pay for your karate classes if you take classes for m months.

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.