Question

Solve the system of equations by graphing. Then classify the equations as dependent or independent and the system as consistent or inconsistent.

2x-y=8
8x-4y=8

Answer 1

Oh - look who it is.

Answer 2

yes and I'm still needing help. I understand slope, but I need a refresher over it. As for the rest, I don't know how to tell one from the other.

Answer 3

So what exactly are you having trouble with? Is it solving the system, the depend-independent, or the consistant-inconsistant?

Answer 4

[One Eternity Later...]

Answer 5

Let's try this again.. it reloaded before I could post. I need help with all of it. I don't understand the last part of it at all. The consistent and dependent part. I need help remember the steps to solve the equation so I can graph it.

Answer 6

2x-y=8
8x-4y=8

We want either the x or y term to cancel out. It's your choice. Look at both the equations. If we multiplied the first equation by -4, then we can cancel the Xs, right?

Answer 7

"Solve the system of equations by graphing." If that is in written homework, Jewels89 will need the graph.

Answer 8

In order to graph it you need to find your x and y points. ;)

Answer 9

@e.mccormick its just a blank graph. I have to put the lines on it after I find the slope.

Answer 10

and right. So multiply by -4?

Answer 11

Correct. So do that

Answer 12

Um.... They are two lines, no need to solve for the intersection. Just set \(x_1\) to 0, solve the \(y_1\) intercept. Then set \(y_1=0\) solve for \(x_1\). 2 points, draw line. Repeat for second line.

Answer 13

\[-8x-4y=-12\]\[8x-4y=8\]\[-8y=-4\]\[y=0.5\]

Answer 14

correct?

Answer 15

Watch your sign on your y.

Answer 16

\(2x-y=8\)
\(-4\cdot [2x-y]=-4\cdot [8]\)
Then what happens to the y?

Answer 17

Huh?

Answer 18

No, I continued to run into her threads. We were joking.