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Algebra/Substitution and Elinination
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Question
Pietro needs to rent a truck for 1 day. He calls two rental companies to compare costs. Joe's garage charges $80 for the day and $0.22/km. Ace Trucks charges $100/day and 0.12/km Under what circumstances do the 2 companies charge the same amount ? When would it be better for Pietro to rent from Joe's Garage ?
Let k = kilometer travelled.
The costs are $80 + $0.22k and $100 + 0.12k
Set 80 + 0.22k = 100 + 0.12k to find out when they are the same.
Add -80 - 0.12k to both sides giving 0.10k = 20.
Divide by 0.1, giving k = 200.
Looking back at the problem, it looks like the distance is 200km.
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Algebra
Answers by Expert:
Scott A Wilson
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Any algebraic question you've got, like linear, quadratic, exponential, etc.
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MS at math OSU in mathematics at OSU
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