Which is a factor of 91 multiple choice 7 20 4 or 12

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?

Which graph represents the linear function below? y-3=1/2(x+2)

Can someone me with my math problem pls my teacher is on my back about this