How do i write a function rule for: 7 less than three fifths of b is a

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2

Twelve less than a number is at most 20

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.