What is the constant of the quadratic expression in this equation?

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?

If you measured the width of a window in inches and then in feet with measurement would you have the greater number of units

Y= a(x-3)squared-1 what is the value of a