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Zetison
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[PLAIN]http://folk.ntnu.no/jonvegar/images/math.gif [Broken]
I really need some help here (no program is allowed )
I really need some help here (no program is allowed )
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Sorry mac, it is "79"Count Iblis said:There is a typo in the problem: "79" should be "78".
To solve a system of two equations with two variables, you can use the substitution method, elimination method, or graphing method. First, choose which method you prefer and solve one equation for one of the variables. Then, substitute this expression into the other equation and solve for the remaining variable. Finally, substitute the value of one variable into either equation to find the value of the other variable.
Yes, the substitution method can be used for any system of two equations with two variables. However, it may not always be the most efficient method. For example, if one of the equations is already solved for one of the variables, it may be easier to use the elimination method.
A system of two equations with two variables will have a unique solution if the two lines intersect at one point. This means that the two lines are not parallel and have different slopes. If the two lines are parallel, they will never intersect and the system of equations will have no solution. If the two lines are the same, they will intersect at infinitely many points and the system of equations will have infinite solutions.
Yes, you can solve a system of two equations with two variables by graphing the two lines and finding the point of intersection. This method may be helpful if the equations are simple and easy to graph, but it may be less accurate than using algebraic methods.
If a system of equations is inconsistent, it means that the equations do not have a common solution. This could happen if the two lines are parallel and never intersect, or if the two lines are the same. In this case, the system has no solution. You can check for inconsistency by solving the equations using any method and seeing if you get a contradiction, such as 0=1.