SOLUTION: Hi, please help me solve this. Thank you and have a good day.
A homeowner has kept records of the average monthly electric bill for 4 yrs.
Year |Amount ($)
1
Algebra.Com
Question 1062406: Hi, please help me solve this. Thank you and have a good day.
A homeowner has kept records of the average monthly electric bill for 4 yrs.
Year |Amount ($)
1 |102.60
2 |108.00
3 |113.40
4 |118.80
a. Do the average monthly electric bills follow an arithmetic progression?
b. Write an expression for the nth term of the sequence.
c. Predict the average monthly bill for year 6 if this trend continues.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Here is the differences
---------------------
[ 2 minus 1 ] =
[ 3 minus 2 ] =
[ 4 minus 3 ] =
so, it's an arithmetic progression
------------------------
So, if year number 1 has average bill
, then
Let = year number
Let = average monthly bill for
year number
------------------------------------
Now if I start with , I get
------------------------------------
Average monthly bill for year 6 is
$129.60
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