Answer true or false following statements

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?

Find the slope of the line that contains the following points. r(-2, 4), s(6, -2)

3382-299=3383- ? fill in the blank?