Question 118360
let x=number, y="other number" ___ x+3y=18 ___ x=18-3y


product=x*y ___ p=(18-3y)y ___ p=18y-3y^2


maximum is on the axis of symmetry ___ y=-b/2a ___ y=-18/(2(-3)) ___ y=3


x+3(3)=18 ___ x=9