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In a Northwest Washington County, speeding fines are determined by the formula
F=7(s – 65) + 70
where F is the cost, in dollars, of the fine if a person is caught drwing at a speed of smiles per hour.
If a fine comes to $266, how fast was the person speeding?

Respuesta :

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The person was speeding at 93 miles per hour.

Step-by-step explanation:

  • Step 1: Given the equation to find speeding fine F = 7(s - 65) + 70
  • Step 2: Substitute given details in the equation and find s. F = $266

⇒ 266 = 7(s - 65) + 70

⇒ 266 = 7s - 455 + 70

⇒ 266 = 7s - 385

⇒ 651 = 7s

⇒ s = 651/7 = 93

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