You can see that two consecutive terms always differ by 20.
In other words, you generate the next term in the sequence by adding 20 to the previous one.
This implies the following structure:
In particular, this implies
What is the distance between points A and B?
2 answers:
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If you use an app called Socratic, take a photo of the questions and it will show you how to work it out and the answer and etc.
