Please help me solve this.

In trapezoid efgh, m∠gfe=63∘. identify m∠ghe. !

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 these triangle pairs can be mapped to each other using two reflections?