Answer :
the temperature increased 17 degrees.
to add the difference of a negative and positive number, i added the absolute value of -4 (4) to the larger number (13) and got 17
to add the difference of a negative and positive number, i added the absolute value of -4 (4) to the larger number (13) and got 17
on a number line start at -4 and go in the direction of right for 13 units you will end up at 9