The blue pens would cost $15 and the black ones would cost $25.50. In total that is $40.50.
1400 is the answer jsut mutliply 56 by 25
W can equal any number that is smaller then -9 because if w was -9 then they would be equal
Think of it like this
-3 means move 3 spaces back (or left)
+4 means move 4 spaces forward (or right)
so, from 0, move 3 spaces left
then move 4 spaces right
end up with 1 space right or +1