If two lines intersect, then they what in exactly one point

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?

Which of the following is true for the relation f(x)=2x^2+1

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?