Lowest common multiple of 16 and 32?

Write the system of equations represented by the matrix. 0 1 2 4 -2 3 6 9 1 0 1 3

What could explain what happened when the time was equal to 120 minutes

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)