Review_Part_II_Modeling_Problems_honors_midterm_13

12 melissa purchased an english text a math text and

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12.  Melissa purchased an English text, a math text, and a chemistry text for a total of $276.  The English text was $20  more than the math text and the  chemistry text was twice the price of the math text.  What was the price of each type of textbook?
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13.  John can drive 240 miles in the same time it takes George to drive 220 miles.  If John drives 5 mph faster than George, then how fast does George  drive? 14.  Mr. Watkins wants to have $100,000 in a savings account when his granddaughter is ready for college.  How much must he deposit today in an  account paying 7% compounded annually to have that much money in 18 years? 15.  The function  a ) 002 . 1 ( 2 . 72 L = can be used to model life expectancy L for U.S. white males with present age a.      a)  To what age can a 15 year old white male expect to live?      b)  To what age can a 60 year old white male expect to live? Linear Programming  16.  Mammoth Muffler employs supervisors and helpers.  According to the union contract, a supervisor does 2 brake jobs and 3 mufflers per day, whereas  a helper does 6 brake jobs and 3 mufflers per day.  The home office requires enough staff for at least 24 brake jobs and for at least 18 mufflers per day.  If  a supervisor makes $90 per day and a helper makes $100 per day, then how many of each should be employed to satisfy the constraints and to minimize  the labor costs?  Write a list of inequalities to give the constraints, sketch the graph and find the solution.
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17.  Anita has at most $24,000 to invest in her brother-in-law’s Laundromat and her nephew’s car wash.  Her brother-in-law has high blood pressure and 
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  • Fall '12
  • ChristinaBoehmke
  • Algebra, Harshad number, supervisor, Real estate agent, selling price, old white male

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