emfranco1
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Meghan sells advertisements for a radio station. Each 30 second ad costs $20 per play, and each 60 second ad costs $35 per play. Meghan sold 12 ads for $315. She wrote the system below letting x represent the number of 30 second ads and y represent the number of 60 second ads.

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sqdancefan

Answer:

  (x, y) = (7, 5)

Step-by-step explanation:

Even though you didn't show the equations, perhaps you want their solution.

We believe Meghan's equations would look like ...

  • 20x +35y = 315
  • x +y = 12

Substituting x = 12 -y in the first equation gives ...

  20(12 -y) +35y = 315

  15y = 75 . . . . . . subtract 240, simplify

  y = 5 . . . . . . . . . divide by 15

  x = 12 -5 = 7 . . . find x

Where x and y represent 30-second and 60-second ads sold, respectively, we find that Meghan's sales were ...

  (x, y) = (7, 5)

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