An spaceship travels at 0.83c. It has been gone from the Earth a total of 12 years as measure by
the people on Earth. How much time passes on the spaceship during its travel?

Find the solution of system of equation y= x-4 y=4x+2

What is the slope of the line shown below?

George has seven boxes of five pencils. giulio three boxes of eight pencils. one of the boys arranges all his pencils equally into two groups. was this george or giulio how many are in each group explain