How to solve, a reservoir is 3 1/4 miles wide. tony sails 4/5 the width of the reservoir. about how far did tony sail?

Amerchant has coffee worth $60 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that she will sell for $70 a pound. how many pounds of the & 60 coffee should be used?

Which expression is not a polynomial?

How to find the exponential function y=ca^x, with points (1,2) and (2,1)