Using linear systems to solve problems (2)

In summary, a linear system is a set of equations that can be represented graphically as a straight line and involves solving for the values of two or more variables. These systems can be used to solve real-world problems and there are various methods for solving them, such as substitution, elimination, and graphing. A linear system can have one unique solution, no solution, or infinite solutions, depending on the number of equations and variables and whether the equations are consistent or inconsistent. Consistency can be determined by solving the system or graphing the equations.
  • #1
bkan21
6
0
Provincial Express charges \$4, plus \$1.50/kg, to deliver a package overnight. The Package people charges \$5, plus \$1/kg. When is Provincial Express less expensive to use?
 
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  • #2
Exactly the same as the rental car. Name stuff and demonstrate what you can do.
 
  • #3
What do you know about linear equations? This one will be of the form $y=mx+c$ where "c" is fixed cost and "m" being variable cost (in this case per kilo) and x is mass.

Provincial Express is $4+ 1.50x$ - 4 is the fixed cost and 1.5 the variable cost.

Can you set up an equation for Tehe?
 

FAQ: Using linear systems to solve problems (2)

What is a linear system?

A linear system is a set of equations that can be represented graphically as a straight line. It involves solving for the values of two or more variables that satisfy all of the equations in the system.

How can linear systems be used to solve problems?

Linear systems can be used to solve a variety of real-world problems, such as finding the optimal solution for a business or engineering problem, determining the intersection point of two moving objects, or calculating the break-even point for a company.

What methods can be used to solve linear systems?

There are several methods for solving linear systems, including substitution, elimination, and graphing. Each method has its own advantages and may be more suitable for certain types of problems.

Can linear systems have more than one solution?

Yes, a linear system can have one unique solution, no solution, or infinite solutions. This depends on the number of equations and variables in the system and whether the equations are consistent (have a solution) or inconsistent (have no solution).

How do you know if a linear system is consistent or inconsistent?

A consistent linear system has at least one solution, while an inconsistent system has no solution. This can be determined by solving the system using any of the methods mentioned above, or by graphing the equations and seeing if they intersect at a point.

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