user5922 user5922
  • 21-11-2022
  • Mathematics
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Evie's family is considering the purchase of a new
Heating System. Brand Z costs $800 to buy and power
costs $50 per month to run. Brand K costs $600 to buy but
it is not quite as efficient and power costs are $70 per
month to run.
Write an equation for each air conditioner for a the overall cost after t months.

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