Simplify 7x^2+2x^2 a) 7x^2 b) 9x^2 c) 14x^4 d) 9x^4

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.