three grades of milk are 1 percent, 2 percent, 3 percent fat by volume. If x gallons of the 1 percent grade, y gallons of the 2 percent grade, and z gallons of the 3 percent grade are mixed to give x+y+z gallons of a 1.5 percent grade, what is x in terms of y and z?
a) y+3
b) y+z/4
c) 2y+3z
d)3y+z
e) 3y +4.5z
a) y+3
b) y+z/4
c) 2y+3z
d)3y+z
e) 3y +4.5z
