
Concept explainers
a.
To find: the approximation breakeven point for buying the mug of coffee and refile of coffee and comparison the coffee in disposal cup.
a.

Answer to Problem 51PPS
9 refills of coffee.
Explanation of Solution
Given:
The green café offers a reduce refile café on coffee anyone for reducing waste.
The mug cost
Calculation:
First, make two equations in y = form out of the information provided. y is cost and x is the number of refills.
Next, plot the graph. The place where the lines intersect is the "breakeven" point which is the point where investing in a re-usable mug becomes more price efficient than disposable cups. So the breakeven point is at 9 refills of coffee.
Hence, the approximation breakeven point for buying the riffles of coffee is 9 refills of coffee.
b.
To check: whether the given offer is best among two.
b.

Answer to Problem 51PPS
Refillable coffee mug is better.
Explanation of Solution
Given:
The green café offers a reduce refile café on coffee anyone for reducing waste.
The mug cost
Calculation:
The offer with the refillable coffee mug is better because after only 9 refills you start saving money as compared to an ordinary disposable cup.
c.
To explain: about your decision to choose the better option
c.

Explanation of Solution
Given:
The green café offers a reduce refile café on coffee anyone for reducing waste.
The mug cost
Calculation:
If the refillable mug was extended for a year my decision would remain the same because it chose to use the mug in the first place. However, extending it for a year would sway me more heavily to using the mug in the first place because of all the savings one would receive over the course of the year.
Chapter 3 Solutions
Algebra 2
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