| 1  2  3  4|
| 5  6  7  8|
| 9 10 11 12|
|13 14 15... (answered by Edwin McCravy)

13+(-2)+10+(-5)+(-12)= (answered by qwe123a)

-9 + 12 -7 - 2 +... (answered by checkley71)

I really need help with solving this problem. Could someone please help me?
12 – x > 15... (answered by rfer)

i need your help with x/13+3=-2
 (answered by checkley77)

i really need help with these questions thank you 
8. -27=20w=73
9. 13=5-8m
10.... (answered by 1998Baby)

A box contains 13 white cards numbered 1 through 13. List the sample space of the event... (answered by edjones)

2/13 plus... (answered by oberobic)