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15-04-2018
Mathematics

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Debbie pays $90 per month for her cell phone bill. Write an equation to model the cost of her monthly bill (c) for (m) months.

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15-04-2018

90m=C
If there were any additional costs such as fees then you would add it to 90m.
Replace m with the number of months.
EX: after 3 months - 90(3)=C | C=$270

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