Can someone be ever so kind and me with 20-24

What could explain what happened when the time was equal to 120 minutes

What’s 8y+48 and factor each expression completely

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.