Find the length of side x in simplest radical form with a rational denominator
Help please!

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?

For what value of x does 4x = (1/8) x + 5?

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180