If a tables patterns is that the f(x) values are being divided by four, what is the common ratio

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?

Write an expression that has three terms and simplifies to 4x - 7. identify the coefficient(s) and constant(s) in your expression

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?