Four equals the difference of eight and a number and the result is divided by four

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

M. xyz =radians. covert this radian measure to its equivalent measure in degrees.

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?