7m-5-n-8k term I want to know what it is

Which statement about the relative areas of triangle abd and triangle xyz is true

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 solutions for a triangle with a =16, c =12, and b = 63º