Which of the following expressions represents “7 less than a number is 18”? 1.)none of the choices are correct. 2.) x - 7 = 18 3. )18 – x = 7 4. )-7x = 18 5. )7 – x = 18

Norder to get a certain shade of blue paint, a mixer must have 5 parts white paint to 3 parts blue. if 4 gallons of paint must be mixed, how many gallons of white paint must be used?