SOLUTION: what is the 20th term for this set of numbers? 12, 19,26, 33

Question 211895: what is the 20th term for this set of numbers? 12, 19,26, 33
Answer by drj(1380) (Show Source): You can put this solution on YOUR website!
What is the 20th term for this set of numbers? 12, 19,26, 33

Step 1. Look for a pattern. In this case the next number is 7 greater than the previous number.

Step 2. Here's a formula for this set of numbers:

so if n=1 then expression is 12 if n=2 then expression is 19.

Step 3. Let n=20, then

Step 4. ANSWER: The 20th term is 145

I hope the above steps were helpful.

For FREE Step-By-Step videos in Introduction to Algebra, please visit http://www.FreedomUniversity.TV/courses/IntroAlgebra and for Trigonometry visit http://www.FreedomUniversity.TV/courses/Trigonometry.

Good luck in your studies!

Respectfully,
Dr J
RELATED QUESTIONS
what is the 20th term of 16,49,104,181... (answered by Edwin McCravy)

A lock has a disk with 26 numbers written around its edge. The combination to the lock is (answered by stanbon)

On excercise 30A, there are some questions I was confused about, the numbers were, 24,... (answered by stanbon)

Can someone help me with this problem? I need to find the mean of the following... (answered by mbarugel,Earlsdon)

Find the first term and the common difference of an arithmetic sequence if its 5th term... (answered by Edwin McCravy)

The 20th term is 26 and the common difference is -5. Find the 1st term and 15th... (answered by ikleyn,MathTherapy)

5,5,6,8,11,15 what is the 20th term and 21th (answered by Edwin McCravy)

The sum of the first 12 terms of an arithmetic series is 186, and the 20th term is 83.... (answered by Edwin McCravy)

A lock has a disk with 31 numbers written around its edge. The combination to the lock is (answered by stanbon)