Which expression would be easier to simplify if you used the commutative property to change the order of the number A. 1/4+1/2+3/4
B. 3/2+1/2+(-57)
C. 130+70+(-61)
D. -30+(-90)+12

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.