Can someone meh find the measure of each angle indicated

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?

How do you convert 1.27 to a percentage

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)