Systems of Linear Equations explanations, examples, practice problems. Ready? Let's do this.
Systems of Equations
A system of equations is a group of two or more equations. What, you were expecting robots?Sample ProblemJust to get your feet wet, here's a system of two equations:Another Sample ProblemThe thr...
Systems of Linear Equations
For most of this unit we'll be concerned with linear systems of equations, or systems of equations in which all the equations are linear.
These systems are nice because we can graph each equa...
Solving Linear Systems
Now, of course, comes the big question: if we're asked to solve a system of linear equations and not told how, which method do we use? Oh, sorry. No, we're not going to ask you to prom. We meant...
Word Problems and Lines
Lots of word problems can be solved with systems of linear equations. However, before we bother with those, let's look at some word problems that describe single lines, and we're not referring t...
More About Word Problems
The word problems we looked at in the previous section were obvious. They practically shouted out, "Look! I'm a word problem and I'm talking about two lines!'' Aside from their outbursts being ne...
In the Real World
Systems of equations can be amazingly useful. How else would you figure out how many ounces of 70% dark chocolate and 20% milk chocolate you need to mix to get one pound (16 oz) of 40% chocolate? W...