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Mathematics 8 Online
OpenStudy (anonymous):

Given that the lines are parallel, what is the value of x? -33 11 -11 20.7

OpenStudy (anonymous):

OpenStudy (mathlegend):

Do you know about vertical angles?

OpenStudy (anonymous):

yes

OpenStudy (mathlegend):

Do you understand corresponding angles?

OpenStudy (anonymous):

yes i do

OpenStudy (mathlegend):

So you understand if you slide the 6x-20 up it would then correspond to a spot that would then be vertical to 3x+13

OpenStudy (mathlegend):

There for you have vertical angles... or if you can tell that you also have alternate interior angles... if you notice you are in the center but on opposite sides of the transversal.

OpenStudy (anonymous):

Yes it would be vertical

OpenStudy (mathlegend):

Vertical Angles are equal, right? So are Alternate Interior Angles... so what can you now do with those equations?

OpenStudy (anonymous):

you put them together

OpenStudy (mathlegend):

Set them equal to each other.

OpenStudy (anonymous):

right

OpenStudy (mathlegend):

So do that and try solving it.

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

20.7

OpenStudy (anonymous):

@MathLegend

OpenStudy (mathlegend):

show me your steps

OpenStudy (anonymous):

3x+13=6x-20 3x 3x 13=9x-20 33=9x 0.27

OpenStudy (mathlegend):

You should have subtracted teh 3x...

OpenStudy (mathlegend):

3x+13=6x-20 -3x -3x --------------- (Solve it from here)

OpenStudy (anonymous):

11

OpenStudy (anonymous):

11 am i right?

OpenStudy (mathlegend):

Yes, that is why I gave you a medal. :)

OpenStudy (anonymous):

oooh ok sweet! thank you!!!

OpenStudy (mathlegend):

You are welcome.

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