Find the smallest square number that is divisible by each of the numbers 7 14 and 18

Plz heeeeeeelp plz give me the answer

Find the maximum value of p= 4x + 5y subject to the following constraints :

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.