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Mathematics 21 Online
OpenStudy (jaybear97):

GEO!

OpenStudy (jaybear97):

I have to find X and Y

OpenStudy (jaybear97):

@rational Can i have help please haha

OpenStudy (rational):

diagonals bisect each other : AP = CP BP = DP

OpenStudy (rational):

setup two equations based on that and solve x, y

OpenStudy (jaybear97):

3x = x +y and y = 6x - 40

OpenStudy (rational):

Yes. solve x,y

OpenStudy (jaybear97):

would i subtract 1x from both sides and i have no idea for the 2d one

OpenStudy (rational):

we have two equations : ``` 3x = x +y y = 6x - 40 ``` substitute the value of y from second equation into first equation : 3x = x + 6x - 40 solve x first

OpenStudy (jaybear97):

subtract 1x from 6x?

OpenStudy (rational):

3x = x + 6x - 40 On right hand side, combine like terms x and 6x : 3x = 7x - 40

OpenStudy (jaybear97):

subtract 7 from both sides then/

OpenStudy (rational):

do you mean "subtract 7x" ?

OpenStudy (jaybear97):

yeah

OpenStudy (rational):

looks good

OpenStudy (jaybear97):

so then -4x = 40

OpenStudy (rational):

-4x = -40

OpenStudy (jaybear97):

then divided -4

OpenStudy (jaybear97):

x = 10?

OpenStudy (rational):

Yes!

OpenStudy (rational):

see if you can find "y" using that

OpenStudy (jaybear97):

hmmm

OpenStudy (jaybear97):

3x = 10 + y?

OpenStudy (rational):

3*10 = 10 + y

OpenStudy (jaybear97):

30 = 10 = y subtract the 10 from both sides?

OpenStudy (rational):

30 = 10 + y

OpenStudy (jaybear97):

thats what i meant haha

OpenStudy (jaybear97):

then subtract 10/

OpenStudy (rational):

Yep

OpenStudy (jaybear97):

y = 20

OpenStudy (jaybear97):

now I have to find a and b

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