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supatsarah

can anyone help me with a couple question's about rate of change?

  • one year ago
  • one year ago

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  1. supatsarah
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    Cathy lives in a state where speeders are fined $11 for each mile per hour over the speed limit. Cathy was given a ticket for $99 for speeding on a road where the speed limit is 65 miles per hour. How fast was Cathy driving? 71 mph 79 mph 74 mph 78 mph

    • one year ago
  2. zepdrix
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    Let x be the number of "speeding" miles Cathy is going. 11x <-- this is 11$ for each "speeding" mile. So if Cathy was given a $99 ticket, we could write an equation like this: 11x=99 $11 per mile equals 99 total dollars. Then let's solve for x! Hmm if the speed limit is 65, we our final step will be to add x to 65.

    • one year ago
  3. supatsarah
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    @zepdrix what's x

    • one year ago
  4. supatsarah
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    74 mph got it.

    • one year ago
  5. zepdrix
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    Yay gj \c:/

    • one year ago
  6. supatsarah
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    Forrest Lumber purchased a table saw for $810. After 2 years the saw had a depreciated value of $630. What is the amount of yearly depreciation? @zepdrix can you help me with this? $90 $75 $180 $105

    • one year ago
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