Covert to intercept form. 2x^3-16x^2+30

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

Evaluate the following expression 1/3^2