Answer: 
Step-by-step explanation:
Given

GCF or HCF of the two is the highest common factor

It is clear GCF is 
Answer:
the answer is that the picture
Answer:

Step-by-step explanation:
![\displaystyle -9[5] + 3[7] + 4 = -45 + 21 + 4 = -20](https://tex.z-dn.net/?f=%5Cdisplaystyle%20-9%5B5%5D%20%2B%203%5B7%5D%20%2B%204%20%3D%20-45%20%2B%2021%20%2B%204%20%3D%20-20)
I am joyous to assist you anytime.
Answer:
Step-by-step explanation:
(1)
a1=-2
r=-2
