Answer:

Step-by-step explanation:
We have a geometric sequence with:
,
, and 
Where
Sn is the sum of the sequence
r is the common ratio
is the first term in the sequence
n is the number of terms in the sequence
The formula to calculate the sum of a finite geometric sequence is:

Then:

Now we solve for 


Answer:
A
Step-by-step explanation:
They are congruent
Answer:
0.55555555555555555555555555556
<em>(The 5 is repeating, so I rounded the last digit to 6.)</em>
Step-by-step explanation:
Divide 5/9. You get 0.5555... and the 5 is repeating.
Answer:
System
Step-by-step explanation:
Answer:
y=2x+7
Step-by-step explanation:
y-y1=m(x-x1)
y-9=2(x-1)
y=2x-2+9
y=2x+7