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vredina [299]
2 years ago
13

Abi has 20 cents. Se bought x pencils for 3 cents each. If y equals the number of cents left, write an equation that shows the d

ependence of y on x. What is the domain of the function?
Mathematics
1 answer:
Anna35 [415]2 years ago
7 0

Answer:

<u>The function would be:</u>

  • y = 20 - 3x

<u>Since y should be positive or zero:</u>

  • 20 - 3x > 0
  • 3x < 20
  • x < 7

So x can get values from 0 to 6.

<u>The domain is:</u>

  • x∈N, x = [0, 6]
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