If C=2y-1C=2y−1 and D=y-y^{2},D=y−y 2 , find an expression that equals 3C+D3C+D in standard form.

Match each expression with its simplified form.

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?

What is the result of the following division?