Using linear systems to solve problems (1)

In summary, linear systems are a set of equations with multiple variables that can be solved simultaneously. They are commonly used in fields such as engineering, economics, and physics to model and solve various problems. There are various methods for solving linear systems, and their limitations include only being suitable for linear problems and the accuracy of the solutions depending on the given equations. To check for the correctness of a solution, one can substitute the values into the original equations or use matrix operations.
  • #1
bkan21
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0
Sook-Lee wants to rent a car for a day so she can visit her sister at university. She has called two car rental agencies. Rent-a-Heap charges \$50 per day, plus \$0.12/km. Kurt's Rent-a-Car charges \$40 per day, plus \$0.20/km. At what distance will the cost of renting of a car be the same from companies?
 
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  • #2
We are warned that it is a linear system. There should be a lot of y - mx + b going on. Maybe Ax + By = C.

Rules #1 - Name Stuff!

D = Daily Charge
M = Mileage Charge

Now what?
 
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  • #3
* y = mx + b
 

Related to Using linear systems to solve problems (1)

1. How do linear systems help in solving problems?

Linear systems are a set of equations with multiple variables that can be solved simultaneously. By solving these equations, we can find the values of the variables that satisfy all the equations, making it easier to find solutions to complex problems.

2. What are some real-world applications of using linear systems to solve problems?

Linear systems are commonly used in fields such as engineering, economics, and physics to model and solve various problems. For example, they can be used to optimize production processes, forecast future trends, and solve optimization problems in calculus.

3. Can linear systems be solved using different methods?

Yes, there are various methods for solving linear systems, such as graphing, substitution, elimination, and matrix operations. The choice of method depends on the complexity of the system and personal preference.

4. Are there any limitations to using linear systems to solve problems?

Linear systems can only be used to solve problems that can be represented by a set of linear equations. They are not suitable for solving nonlinear problems, and the accuracy of the solutions depends on the accuracy of the given equations.

5. How can I check if my solution to a linear system is correct?

You can check your solution by substituting the values of the variables into the original equations and making sure they satisfy all the equations. You can also use matrix operations to verify the solution.

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