SOLUTION: I just need some guidance on what information I'm not including to accomplish my goal. I tutor myself, but these type of word problems give me trouble. Martha currently drives 1

Question 92585: I just need some guidance on what information I'm not including to accomplish my goal. I tutor myself, but these type of word problems give me trouble.
Martha currently drives 10 miles to work (one way) where she makes $13.00/hour.
Her new job is 7 miles further (one way) than her old job. How much of a raise should she ask for to compensate for the increase in distance?
What other information do I need, and what formula(s) should I be using?
Thanks
Debby
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Martha currently drives 10 miles to work (one way) where she makes $13.00/hour.
Her new job is 7 miles further (one way) than her old job. How much of a raise should she ask for to compensate for the increase in distance?
What other information do I need, and what formula(s) should I be using?
:
WE should know the cost per mile to operate her car, here is a method
:
Assuming she works an 8 hr day and makes a round trip each day.
Old job round trip = 20 mi; New job round trip = 34 mi
:
Assume it cost $1 per mile to drive her car. (makes it easy)
:
She makes 8 * 13 = $104 per day and drives 20 miles
:
Let x = amt of increase per day to equal her original job
:
New job net income = old job net income
(104+x) - 34 = 104 - 20
x = 104 - 20 + 34 - 104
x = $14 per day increase in pay
:
That's an hourly increase: 14/8 = $1.75 per hour; which is $14.75 per hr
:
:
We can check this out:
Old job net = new job net
(8*13) - 20 = (8*14.75) - 34
104 - 20 = 118 - 34
$84 = $84
:
Note that his is predicated on a $1 per mi operating expense
:
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