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Mathematics, 31.05.2021 18:10 noahwaitsowl357

For his long distance phone service, Keith pays a $5 monthly fee plus 9 cents per minute. Last month, Keith's long distance bill was $21.02. For how many minutes was Keith billed?

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For his long distance phone service, Keith pays a $5 monthly fee plus 9 cents per minute. Last month...
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