What is a expression that is equivalent to 2x^2 + (4x-5x^2) +9-(6x+3)

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

If $740 is invested at an interest rate of 11% per year and is compounded continuously, how much will the investment be worth in 7 years? use the continuous compound interest formula a = pert.

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?