I need the reasoning?

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?

Consider circle h with a 3 centimeter radius. if the length of minor arc what is the measure of zrst?

Adozen bananas weigh 3 pounds how many ounces does 1 banana weigh