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Mathematics 15 Online
Nicole:

http://prntscr.com/lcwxgg

Nicole:

@Vocaloid @dude

Nicole:

@sillybilly123

dude:

You probably want to re-write them in slope-intercept form \((y=mx+b)\) Do you know how to do that?

Nicole:

Im not sure

dude:

You want to isolate the y-variable Ex. 1 one \(2x-y=-5\) Opposite of +2x is subtracting 2x \(-y=-2x-5\) I presume you know what to do from here, no?

Nicole:

Ex. 2 2x+y=5 Opposite of +2x is subtracting 2x +y=-2x+5

Nicole:

right @dude

dude:

Yes that is the second equation, there was 1 step missing in the one I did, I thought you were going to notice it \(-y=-2x-5\) Divide both sides by -1

Nicole:

okay so what do we do next

dude:

Set them equal to each other \(2x+5=-2x+5\) Now solve for x

Nicole:

x=0

dude:

That is the solution

Nicole:

So its none (B

dude:

I just said that is your solution haha x=0 is the solution not to be confused with x being cancelled out (in which it would not have any)

Nicole:

http://prntscr.com/lcx8ak

dude:

Solution is where they intersect, look at the x and y value at where they touch

Nicole:

(6,-6)

dude:

The x-coordinate is not right, it is below 5

Nicole:

if its below 5 it would be 4

Nicole:

@Bob @563blackghost @dude

Nicole:

@Vocaloid

Bob:

nice mass tag gril

Nicole:

lmao i need help asap

dude:

Close, each line goes up by 1

Bob:

evil hamster man

Nicole:

im confused lmao

dude:

http://prntscr.com/lcxems

Nicole:

3

dude:

Yes (3,-6)

Nicole:

A

Bob:

wow diwect answugh

dude:

Right

dude:

Boi that was not direct answer smh

Nicole:

that wasnt direct

Nicole:

https://prnt.sc/lcxevt

Bob:

wOt iT wAsNT ?

dude:

Do you know how to graph?

Nicole:

not that lol

Bob:

so first you can plug the y values and x values of each of the choices into the first equation let's start with A y = x - 1 3 = 4 - 1 now B y = x - 1 4 = 3 -1 now C y = x - 1 -3 = -4 - 1 now D y = x - 1 -4 = -3 - 1

Bob:

@Nicole which choices are true when plugging in the y and x values

Bob:

@dude she's gone she was so desperate she left

Nicole:

"she was so desperate she left" ok lol

Bob:

u gonna answer

Nicole:

C or D?

dude:

Might want to graph it https://www.desmos.com/calculator/5dco2ygqsz

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