Can someone explain these mathematical methods?
Can anyone explain these three methods in plain English please? (examples are fine, too)
The Substitution Method
The Elimination Method
Graphing Inequalities (the thing that uses y= mx+b and either a dotted or solid line to graph)
thank you~
For substitution you would use a given amount for a variable, for example when given the equation y=14x+72 you may be told the value of x or the value of y and would therefore substitute in the value that you were given to find the correct answer.
The elimination method is used when you have two equations with the same variables. The best way to do this is to either add or subtract the two equations. You would multiply both of the equations so that when you add or subtract you would cancel out one of the variables, from there you are able to solve for the remaining variable and therefore find the correct values for both variables.
When graphing inequalities you must remember that y=mx+b is a the formula for slope, and that slope is simply rise over run. Therefore m = rise and b = run.
Good luck!
Lec 1 | MIT 18.086 Mathematical Methods for Engineers II
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