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Mathematics 15 Online
OpenStudy (anonymous):

Just checking my answers. What are the classifications of each system? 1. 4x-2y=10 A. consistent independent 2x-y=5 B. coincident C. inconsistent 2. y=2x-3 -2x+y=-5 3. 2x-5y=14 3x+4y=10 4. y=4x-3 12x-3y=9

OpenStudy (anonymous):

1. B 2. C 3. B 4. D

jimthompson5910 (jim_thompson5910):

D isn't listed (so idk what it says) and #3 is incorrect

OpenStudy (anonymous):

Oh my bad I meant A

OpenStudy (anonymous):

Is 3 A too?

OpenStudy (anonymous):

@jim_thompson5910 ?

jimthompson5910 (jim_thompson5910):

let me see

jimthompson5910 (jim_thompson5910):

yes the two lines have different slopes which mean that the two lines must intersect somewhere exactly once so yes, the answer for 3 is A

jimthompson5910 (jim_thompson5910):

#4 isn't A

jimthompson5910 (jim_thompson5910):

try graphing the two lines

jimthompson5910 (jim_thompson5910):

you can use something like this https://www.desmos.com/calculator if you don't have a graphing calculator

OpenStudy (anonymous):

Ok I use the link I came out with C

jimthompson5910 (jim_thompson5910):

try it again, you shouldn't get parallel lines

OpenStudy (anonymous):

I didnt

jimthompson5910 (jim_thompson5910):

you got one line only?

jimthompson5910 (jim_thompson5910):

one of the lines will lie perfectly on top of the other that means you have a coincident system

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