Answer:
189
Step-by-step explanation:
21 times 6 + 7 times 9 = 189
You would have to put 4.99 times 20 which will cost 99.80 for 20 gallons.
I don’t even know :( sorry
Answer:
The other factor is 
Step-by-step explanation:
we know that


In this problem we have

and
-----> because is a factor
substitute and solve for b

so

Verify in the second equation
----->
----->
--> is ok
The other factor is 