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3 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?

1 answer:

Anna35 [415]3 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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