What is this equation -3 +9 +-3

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 abcde is reflected over the x-axis and then translated 3 units left, what are the new coordinates d? are he re

What multiplys to be 1 but adds up to be 4