What is the domain of f(x) = 3x/x-1?

a all real numbers
b all nonzero numbers
c all real numbers except 1
d all real nunbers except 3

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?

Acarton of juice contains 64 ounces miss wilson bought six cartons of juice how many ounces of juice did she buy

If the tip varies directly with the number of guest which equation represents between the tip, t, and the number of guest, g?