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

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Question 211895: what is the 20th term for this set of numbers? 12, 19,26, 33
Answer by drj(1380) About Me  (Show Source):
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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:

12%2B7%2A%28n-1%29 so if n=1 then expression is 12 if n=2 then expression is 19.

Step 3. Let n=20, then

12%2B7%2A%2820-1%29=145

Step 4. ANSWER: The 20th term is 145

I hope the above steps were helpful.

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Good luck in your studies!

Respectfully,
Dr J