Question

Need in 10 minutes!!

What are the classifications of each system?

A. consistent independent
B. coincident
C. inconsistent


1. 4x + y = 8
x + 3y = 8

2. -4x + 6y = -2
2x - 3y = 1

3. 5x - 2y = 4
5x - 2y = 6

4. y = 3x - 4
-3x + y = -2

Answer 1

@jim_thompson5910

Answer 2

@zepdrix

Answer 3

@Babynini

Answer 4

@satellite73

Answer 5

Can anyone help me please?

Answer 6

https://www.desmos.com/ use this

Answer 7

Well assuming you're not going to graph them..if you solve the system and get something like 0 = 8 that means there is no solution and is inconsistent.
If you get 0 = 0 then there is a infinite amount of solutions and the system is dependent and a coincident.
If you get something like x = 1, or something then there is one solution and the system is independent.

Answer 8

Or you can use desmos L

Answer 9

I know those, thank you. I was just wondering if you could explain how to graph them?

Answer 10

You can set the equations up into y = mx+b form and graph them

Answer 11

if the lines are parallel then there is no solution means (coincident)
you can solve both equations for y you should get same slope different y-intercept

Answer 12

i meant to say inconsistent

Answer 13

Rather then us explaining it all just use this site, but if you still need help with graphing just ask http://www.algebra.com/algebra/homework/coordinate/Types-of-systems-inconsistent-dependent-independent.lesson

Answer 14

http://prntscr.com/94e3nw

Answer 15

I just need help getting them into the equation y = mx + b.

Answer 16

Sure, so we have this equation 4x + y = 8, to set it up into y = mx+b form, notice we just solve for y.

y=-4x+8

Answer 17

subtracted -4x on both sides, try the others it will be good practice

Answer 18

So the second equation is x + 3y = 8. Would the slope-intercept form be:
x + 3y = 8
3y = -x + 8

Then what would I do from there?

Answer 19

@astrophysics

Answer 20

Exactly, but notice you have a 3y, so we need y on its own, so what can you do to get rid of that 3?

Answer 21

Divide by 3.

Answer 22

Exactly, go ahead and do that

Answer 23

How would you divide -x by 3?