tygrr321
  • tygrr321
need help fast
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
tygrr321
  • tygrr321
1 Attachment
tygrr321
  • tygrr321
@Cardinal_Carlo
Astrophysics
  • Astrophysics
|dw:1450226579563:dw|

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Astrophysics
  • Astrophysics
What happens if you add 9y on both sides lets say
tygrr321
  • tygrr321
i dont get it
Astrophysics
  • Astrophysics
|dw:1450226699905:dw| right?
Astrophysics
  • Astrophysics
What you do to one side you must also do to the other
Astrophysics
  • Astrophysics
So you want to isolate y, meaning get y on its own
Astrophysics
  • Astrophysics
So a easy way to look at it is if you notice the operation on the left side was -9y so we way mhm ok how can I cancel that out, you simply add 9y but you must do it to the other side of the equal sign to. So use the opposite operation of what already exists.
Astrophysics
  • Astrophysics
Now since we have 9y as positive, lets get rid of the 11 how can we do that?
tygrr321
  • tygrr321
subtract 11 from both sides?
Astrophysics
  • Astrophysics
Yes!
Astrophysics
  • Astrophysics
So we have |dw:1450226944732:dw|
Astrophysics
  • Astrophysics
Now it's a bit tricky any idea?
tygrr321
  • tygrr321
divde 9 on both sides?
Astrophysics
  • Astrophysics
You're a true jedi..err sorry a dark lord!
tygrr321
  • tygrr321
lol
Astrophysics
  • Astrophysics
Well done
Astrophysics
  • Astrophysics
|dw:1450227022959:dw|
Astrophysics
  • Astrophysics
Which you can split like |dw:1450227049187:dw|
tygrr321
  • tygrr321
it doesnt look like the choices
tygrr321
  • tygrr321
oh nvm
tygrr321
  • tygrr321
thx
Astrophysics
  • Astrophysics
Np
tygrr321
  • tygrr321
1 Attachment
tygrr321
  • tygrr321
a few more?
Astrophysics
  • Astrophysics
Just this one for this post haha
Astrophysics
  • Astrophysics
But it's simple, simply plug in the values you are given and see if left side = right side
Astrophysics
  • Astrophysics
|dw:1450227267907:dw|
Astrophysics
  • Astrophysics
So look at the first answer A) (0,4) which is set as (a,b) so a = 0 and b = 4 \[7(0)-5(4) = 28\] is this true
Astrophysics
  • Astrophysics
Obviously not right, -20 = 28 that's not right
Astrophysics
  • Astrophysics
Move on to the next option then
tygrr321
  • tygrr321
oh i c
tygrr321
  • tygrr321
|dw:1450227435694:dw|
Astrophysics
  • Astrophysics
Looks good

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