I dont understand how to do this

Match each graph with the correct equation from the equation bank. not all equations will be usef

Consider the diagram. which line segment has the same measure as st? rx tx sr xs

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?