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OpenStudy (anonymous):
A swim pass costs $30 for the first month. Each month after that, the cost is $20 per month. Riley wants to swim for 12 months. The sequence for this situation is arithmetic. What is the common difference?
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OpenStudy (anonymous):
you start with 30 and then add 20 each time 30,50,70,... common difference is therefore 20
OpenStudy (anonymous):
thank you!
OpenStudy (anonymous):
yw
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