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John is saving for his trip to see the Alamo. He started with $27 in his savings account. Every week he earns $20 for baby-sitting. Out of that, he spends $9 and saves the rest. John uses the rule add 11 to find out how much money he has at the end of each week. What are the first 8 numbers in the pattern? Explain how you solved the problem.

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jesusm1

Answer:

Concept: Unit Measures

  • We have a series to quantify a value of time
  • We are using the rule of 11 such that he saves 11 usd dollars and spends 9 usd which is roughly just under 50% of his weekly income
  • Hence: 27+11(x)
  • We want the first 8 numbers aka the first 8 weeks
  • So: 27 + (11×1)= 38
  • You can do the rest just solve until x=8
  • So we solved by using a linear representation.

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