Break-Even Points Answers

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1
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Mary’s yard is a mess. She needs to hire someone to prune her trees and shrubs. A landscaping service she calls quotes her a price of $15 consultation fee plus $8 an hour for the actual work. Mary’s neighbor has offered to help her out. She doesn’t charge a consultation fee, but does charge $10 an hour for her work. Who do you think Mary should hire for a 3-hour job? When, if at all, would it be more economical to hire the other service. (Set up and solve a system of equations to answer this question.)

A
Mary should hire her neighbor; if there was more than 7.5 hours of work she should hire the landscaping service.
B
Mary should hire her neighbor; if there was more than 4.2 hours of work she should hire the landscaping service.
C
Mary should hire the landscaping service; if there was more than 7.5 hours of work she should hire her neighbor.
D
Mary should hire the landscaping service; if there was more than 4.2 hours of work she should hire her neighbor.
2
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Mike has $22 in his bank account and deposits $11.50 each week. At the same time, Tim has $218 in his account but is withdrawing $13 each week.When will the accounts have the same balance? How much money will each of them have after 12 weeks?

A
The accounts will have the same balance at 8 weeks; Mike will have $160 and Tim will have $62 after 12 weeks.
B
The accounts will have the same balance at 10 weeks; Mike will have $160 and Tim will have $62 after 12 weeks.
C
The accounts will have the same balance at 8 weeks; Mike will have $62 and Tim will have $160 after 12 weeks.
D
The accounts will have the same balance at 10 weeks; Mike will have $100 and Tim will have $50 after 12 weeks.

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