Answer:
8
Step-by-step explanation:
Hope this helped, Have a Wonderful Day!!
This is how I would go about solving this, hope it helps.
Answer:
X=2
If 21+6=27 then subtract what f(x) is (which is 18) from the 27. 27-18=6 then 3x2=6 so therefore your answer is 2. Hope this helps!!
Answer:66
Step-by-step explanation:
an=21+5n
ninth term is a9
a9=21+5x9
a9=21+45
a9=66
For this case we can propose a rule of three:
bottle ------------> 
minutes
x --------------------------------------> 1 minute
Where the variable "x" represents the number of bottles that can be filled in 1 minute.
Thus, William can fill 
of a water bottle in 1 minute.
Answer:
William can fill of a water bottle in 1 minute.
