Answer:

Step-by-step explanation:
We want to find
.
can be written as
, so we can now write our original equation as:
.
We can combine like terms: 
Hope this helps!
Answer:
Explanation:
first term, a₁ = 1
difference between the terms: -3
- used geometric formula :

<u>where "a₁ is first term" and "r refers to common difference"</u>
- formula for this nth term:

The answer would be $2.20 because if 10 minutes is $1.10 then add another 10 minute price to that and it’s $2.20.