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------------------------------------------------ It costs $80 to buy an air conditioner and about $0.40 per minute to run it. Which equation models the total cost of using an air conditioner?

Answer :

It costs $80 to buy an air conditioner. The cost to run it for 1 minute is $0.40.

Cost = $80

Run per minute = $0.40.

There's no exact time so substitute a variable for it: m

Add everything together.

[tex] \$80+\$0.40m [/tex]

$80 is the price to buy it. $0.40 is the price to run it for one minute. m is a variable substituting the time it runs.

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