In parts (a) and (b) below, copy the number lines and use them to show the solution to the problems.

3. Show $-3 + 4 + (-1)$ on a number line.

   Hint (c):

   See parts (a) and (b) for help.

4. Rachel said that $-4 + (-3)$ will be positive because two negatives always give a positive. Draw the problem on a number line, then explain whether you agree or disagree with Rachel.

   Hint (d):

   
   Explain why a negative number plus a negative number is always a negative number.

   More Help (d):

   $-1 + (-2) = -3$
   $-7 + (-4) = -11$