Answer:
17
Step-by-step explanation:
Work backwards from your instructions
36/9 = 4
4 + 13 = 17
Hi, I'd be glad to help.
1) a = 8
2) d = (-21)
3) n = 42
4) t = (-9)
Answer:

Step-by-step explanation:
-Greatest common factor is defined as the greatest positive that divides a set of whole numbers evenly and without a remainder.
-Given the set 
we notice, that the GCF can't be an integer with the power of x greater than 2:

Since, there's no other positive integer than can evenly divide the set of quotients, the GCF is 