If don loses 16 pounds,9 pounds, and 11 pounds during the first three months of his diet, how much will he have to lose during the fourth month so that he will have an average weight loss of 12 pounds per month?

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

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.

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then