Question

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.

Answer 1

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.

Brand Z:

a = 50t + 800

Brand K:

a = 70t + 600