The perimeter of a rectangle is 30 centimeters. the width of the rectangle is 6 centimeters. how long is the rectangle?

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?