What will happen if the reciprocal is not properly used?

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?

Describe the domain and range of y=2(3)^x-2+5

What is the difference between the equations of a vertical and a horizontal line?