Asked by Anonymous
The local baseball team is advertising a special deal on ticket prices. The cost of the first ticket to a game is $12 and every ticket after that costs $0.25 less. If the maximum number of tickets you can buy is 30, what is the total cost of 30 tickets?
Wouldn't you use
Sn = n / 2 (a1 + an)
Wouldn't you use
Sn = n / 2 (a1 + an)
Answers
Answered by
Reiny
So you are finding
12 + 11.75 + 11.50 + ... for 30 terms
I would use
S(n) = n/2( 2a + (n-1)d) since we don't know the last term, as needed in your formula
I know we could find the last term, then use your formula but the above one would be faster in this case
S(30) = (30/2)(24 + 29(-.25))
= 15(16.75) = 251.25
12 + 11.75 + 11.50 + ... for 30 terms
I would use
S(n) = n/2( 2a + (n-1)d) since we don't know the last term, as needed in your formula
I know we could find the last term, then use your formula but the above one would be faster in this case
S(30) = (30/2)(24 + 29(-.25))
= 15(16.75) = 251.25
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.