Pls help homework https://cutt. ly /qzTBZlE

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?

Simplify the expression. -2/5(10+15m-20n)

Iwill give you ! what is the measure of ∠v ?