Find the midpoint between the points (-1, 16) and (-9,-2)

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?

What is the solution set of the quadratic inequality x^2-5< or equal to 0

Write the expression as a single natural logarithm. 2 in a - 4 in y