Question

a housekeeper mixed 5 gallons of blue paint with every 9 gallon of yellow paint in order to make a green paint which ratio of gallon of blue paint to gallon of yellow paint will make the same shade of green paint​

Answer 1

10 gallons blue to 18 gallons red.
to find the answer, multiply/divide both 5 and 9 by the same number. In this case, I multiplied them both by two. 5×2=10, 9×2=18.