plz help Stefan is three years younger than his sister Katie. The sum of Stefan’s age years ago and ⅔ of Katie’s age at that time is . How old is Katie now

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

Aswimming pool is a rectangle with semicircles on the end. the rectangle is 12 meters wide and 30 meters long. the diameter and width of the swimming pool are equal. sketch and label an overhead diagram of the swimming pool. find the area of the swimming pool floor.

Guys i really need or i have to stay late up night