How could you use a number line to show that negative 5 + 4 and 4 plus negative 5 have the same value which property states these are equivalant

The value √10 and √15 are plotted on the number line

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer

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.