Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
← 55 members online
 0 viewing
Identify the 42nd term of an arithmetic sequence where a1 = 12 and a27 = 66
 9 months ago
 9 months ago
Identify the 42nd term of an arithmetic sequence where a1 = 12 and a27 = 66
 9 months ago
 9 months ago

This Question is Closed

axelneelBest ResponseYou've already chosen the best response.0
i keep coming up with 126 but my options are 70,72,111,114. PLEASE HELP
 9 months ago

RaphaelFilgueirasBest ResponseYou've already chosen the best response.1
dw:1372218335949:dw
 9 months ago

JhannybeanBest ResponseYou've already chosen the best response.1
\[\large a_{n}= a_{1}+(n1)d\]
 9 months ago

RaphaelFilgueirasBest ResponseYou've already chosen the best response.1
find r and then just plug in that first equation
 9 months ago

JhannybeanBest ResponseYou've already chosen the best response.1
\[\large 66 =12+(271)d \]\[\large 66= 12 +26d\]\[\large 78 = 26d\]\[\large d= 3\] \[\large a_{42} = 12 + 3(421)\]\[\large a_{42} = 12 + 123\]\[\large a_{42} = 111\]
 9 months ago

axelneelBest ResponseYou've already chosen the best response.0
i have no idea what i was doing wrong... but thank you
 9 months ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.