Pls help me,
Answer choices are :

A. 7
B. 30
C. 28
D. 49

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?

Someone answer this check out the image!

Ten times the square of a non-zero number is eqaul to ninety times the number