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Mathematics 18 Online
OpenStudy (anonymous):

can someone please explain how to find the points so i can graph this

OpenStudy (anonymous):

OpenStudy (anonymous):

OpenStudy (anonymous):

someone please help

OpenStudy (phi):

the easiest way to answer this question is change the equation to slope-intercept form y= mx+b can you change -2x-4y=8 ?

OpenStudy (anonymous):

4y=-2x+8?

OpenStudy (phi):

-2x-4y=8 you want y on one side. add 2x to both sides -4y +2x-2x = 2x+8 or -4y= 2x+8 divided both sides by -4 y= (2/-4)x+8/(-4) or y= (-1/2) x -2 the slope is -1/2 (down 1, over to the right 2) It goes through 0,-2 ( b is -2, the y intercept) which graph is this?

OpenStudy (anonymous):

c?

OpenStudy (phi):

Yes. now try the 2nd equation -2x+4y=8 show your steps

OpenStudy (anonymous):

4y=2-8 -4y -4y ----------- 2=12y 2 2 =6 ?

OpenStudy (phi):

your starting equation does not have an x in it. Start with -2x+4y=8 add 2x to both sides

OpenStudy (anonymous):

im doing thee other problem 2x-4y=8

OpenStudy (phi):

ok . start with 2x-4y=8 add -2x to both sides

OpenStudy (anonymous):

4y=10x

OpenStudy (phi):

notice that 2x-4y= 8 when we add -2x to both sides: 2x-2x-4y= 8-2x the 2x-2x is 0 but notice that 8-2x is not 10x

OpenStudy (anonymous):

its 6

OpenStudy (phi):

no. it is not 6. start with 2x-4y=8 add -2x to both sides

OpenStudy (anonymous):

0-4y=10x 0-4y=-10x

OpenStudy (phi):

to add -2x to both sides, write -2x on the left and on the right like this 2x-4y=8 -2x+2x-4y= -2x+8 (we just write down -2x on both sides) now simplify by noticing that -2x+2x is 0 0-4y= -2x+8 0-4y is -4y -4y= -2x+8 can you do that? start with 2x-4y=8 add -2x to both sides

OpenStudy (anonymous):

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