Which of the following equations have complex roots? a. 3(x+2)^2−36=0 b. −x^2=4 c. x^2=x+4 d. 12x^2+x−1=0

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.