If I give my brother $5$ dollars, then we will have the same amount of money. If instead he gives me $14$ dollars, then I'll have twice as much money as he will have. How much money does my brother currently have (in dollars)?

The graph shows the distance y, in inches, a pendulum moves to the right (positive displacement) and to the left (negative displacement), for a given number of seconds x. how many seconds are required for the pendulum to move from its resting position and return? enter your answer in the box.

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters