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timofeeve [1]
3 years ago
13

David travels from Building A to Building B. He can either cycle

Mathematics
1 answer:
Lelechka [254]3 years ago
3 0

Answer:

43 minutes

Step-by-step explanation:

  • <em>Let cycling speed be x and driving speed be y</em>

<u>Equations as per given, considering same distance in both cases:</u>

  • 19x + 8y = 13x + 10y
  • 19x - 13x = 10y - 8y
  • 6x = 2y
  • 3x = y

We see that driving speed is 3 times greater than cycling speed

Then 8 minutes driving = 8*3= 24 minutes of cycling, or 10 minutes of driving = 10*3= 30 minutes of cycling:

  • 19 + 24 = 43 minutes or
  • 13 + 10*3 = 43 minutes is the time to cycle between A and B
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Step-by-step explanation:3 Points

Dawn's credit card has an APR of 15%, calculated on the previous monthly

balance, and a minimum payment of 2%, starting the month after the first

purchase. Her credit card record for the last 7 months is shown in the table

below.

End of

month

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balance

50.00

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$1674 60

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$1649.57

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charges

$1700 00

50.00

50 00

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533 49

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New

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50.00

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How much of the initial purchase has Dawn paid off over the 7 months?

Answer:



Step-by-step explanation:



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