#6 is the question, are these two functions inverse’s

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?

The table respent two linear functions the equation respented by the first tables is given

Select all of the quadrants that the parabola whose equation is y=√x-4 (principal square root) occupies. i ii iii iv