When a box contains 50 identical balls, it has a mass of 13.9kg. the empty box has a mass of 400 g . find the mass of each ball in kilograms

The image of the point (-6, -2)under a translation is (−7,0). find the coordinates of the image of the point (7,0) under the same translation.

Find the difference (8ab+a+2) - (3ab+6)

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?