Many of Exercises 29-40 are similar or identical to ones in preceding exercise sets. Use duality to answer them.
Purchasing The Enormous State University’s Business School is buying computers. The school has two models to choose from, the Pomegranate and the iZac. Each Pomegranate come with 400 GB of memory and 80 TB of disk space, while each iZac has 300 GB of memory and 100 TB of disk space. For reason related to its accreditation the school would like to be able to say that it has a total of at least 48,000 GB of memory and at least 12,800 TB of disk space. If both the Pomegranate and the iZac cost $2,000 each, how many of each should the school buy to keep the cost as low as possible? What are the shadow costs of memory and disk space?
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Chapter 5 Solutions
Finite Mathematics
- Can a linear system of three equations have exactly two solutions? Explain why or why notarrow_forwardGiven a system of equations, explain at least two different methods of solving that system.arrow_forwardIn your own words explain the steps to solve a system of linear equations with three variables by elimination.arrow_forward
- If a given ordered triple does not solve the system of equations, is there no solution? If so, explain why. If not, give an example.arrow_forwardSuppose the coal and steel industries form a closed economy. Every $1 produced by the coal industry requires $0.30 of coal and $0.70 of steel. Every $1 produced by steel requires $0.80 of coal and $0.20 of steel. Find the annual production (output) of coal and steel if the total annual production is $20 million.arrow_forwardIf during the following year it is predicted that each comedy skit will generate 30 thousand and each musical number 20 thousand, find the maximum income for the year. A television program director must schedule comedy skits and musical numbers for prime-time variety shows. Each comedy skit requires 2 hours of rehearsal time, costs 3000, and brings in 20,000 from the shows sponsors. Each musical number requires 1 hour of rehearsal time, costs 6000, and generates 12,000. If 250 hours are available for rehearsal and 600,000 is budgeted for comedy and music, how many segments of each type should be produced to maximize income? Find the maximum income.arrow_forward
- Take a handful of two types of coins, and write a problem similar to Example 4.25 relating the total number of coins and their total value. Set up a system of equations to describe your situation and then solve it.arrow_forwardAn animal shelter has a total of 350 animals comprised of cats, dogs, and rabbits. If the number of rabbits is 5 less than one-half the number of cats, and there are 20 more cats than dogs, how many of each animal are at the shelter?arrow_forwardWrite a uniform motion problem similar to Example 4.15 that relates to where you live with your friends or family members. Then translate to a system of equations and solve it.arrow_forward
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