If l // m, find the value of each missing variable

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

What value of x is in the solution set of 4x - 12 s 16 + 8x? -10 -9 -8 -7

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.