a national appliance store chain is reviewing the performances of its 400 sales associate trainees. how can the store choose a representative sample of the tranees?

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles.

Awoman has 14 different shirts: 10 white shirts and 4 red shirts. if she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? show your answer in fraction and percent, round to the nearest whole percent.

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585