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Sav [38]
3 years ago
6

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

dependence of y on x . What is the domain of the function?
Mathematics
1 answer:
Vladimir [108]3 years ago
7 0

An equation that shows the dependence of y on x is y=20-3x and the domain of the function is x=[0,6], x \in N.

Total number of cents = 20.

She bought x pencils for 3 cents each.

Let y equals the number of cents left.

So, 3x+y=20.

y=20-3x

Here y must be positive

So, 20-3x>0

20>3x

\frac{20}{3}>x

Domain of a function is the set of values for which the function is defined.

So, x can get values from 0 to 6.

Therefore, the domain is:  

x=[0,6], x \in N.

Learn more about domain here:

brainly.com/question/17440903?referrer=searchResults

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