anonymous
  • anonymous
Write An Equation Of Each Line In Standard Form With Integer Coefficient 1.Y=1/2X-2 2.Y=-7X-9 *DIFFERENT PROBLEMS *
Mathematics
  • Stacey Warren - Expert brainly.com
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
1. 2=1/2x-y (I think? I'm not positive.)
anonymous
  • anonymous
2. 9=-7x-y
anonymous
  • anonymous
Your Not Positive ?

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anonymous
  • anonymous
Someone else please check my work before confirming, I don't want to give a wrong answer ;-;
anonymous
  • anonymous
lol its ok
jim_thompson5910
  • jim_thompson5910
Standard form is `Ax+By=C` where A,B,C are whole numbers (most books make A to be a positive number)
jim_thompson5910
  • jim_thompson5910
example of standard form 2x+3y = 10
anonymous
  • anonymous
Ohh
anonymous
  • anonymous
2 will be a and 3 will be b and 10 will be c
jim_thompson5910
  • jim_thompson5910
for my example, yes
jim_thompson5910
  • jim_thompson5910
the goal is to somehow transform y=1/2x-2 into the form Ax+By=C
anonymous
  • anonymous
Ok Can You Help .
jim_thompson5910
  • jim_thompson5910
first multiply every term by 2 to clear out that fraction
anonymous
  • anonymous
1/2 * 2 =1
anonymous
  • anonymous
2 x 2 =4
jim_thompson5910
  • jim_thompson5910
doing that will turn y=1/2x-2 into 2y = x - 4
jim_thompson5910
  • jim_thompson5910
now move the x over
anonymous
  • anonymous
Subtract 2 From Both Sides
jim_thompson5910
  • jim_thompson5910
you need to get the variable terms to one side
anonymous
  • anonymous
So We Dont Subtract 2 from both sides
jim_thompson5910
  • jim_thompson5910
more like subtract x from both sides
anonymous
  • anonymous
2X?
anonymous
  • anonymous
OH NVM I GET WHAT YOUR SAYING X FROM BOTH SIDES SO 1 FROM BOTH SIDES
jim_thompson5910
  • jim_thompson5910
so we now have -x+2y = -4 that's technically in standard form where A = -1, B = 2, C = -4 but most books I've seen make A > 0. Multiply both sides by -1 to get x - 2y = 4
anonymous
  • anonymous
OH
anonymous
  • anonymous
jim ty b/c i don't know what im doing sorry :(
anonymous
  • anonymous
So My End Result Should Of Been X-2Y=4
jim_thompson5910
  • jim_thompson5910
yeah I'd go with x-2y = 4
anonymous
  • anonymous
Ok What About the second problem ?
jim_thompson5910
  • jim_thompson5910
same idea: get all of the variable terms to one side
jim_thompson5910
  • jim_thompson5910
you don't have to worry about fractions this time
anonymous
  • anonymous
lord i be confusing myself z
anonymous
  • anonymous
-7 wll be a corect ?
jim_thompson5910
  • jim_thompson5910
how do you move that -7x over? what must you do to both sides?
anonymous
  • anonymous
subtract 7
jim_thompson5910
  • jim_thompson5910
no
jim_thompson5910
  • jim_thompson5910
|dw:1441330242955:dw|
jim_thompson5910
  • jim_thompson5910
we have to turn that -7x into 0x somehow
anonymous
  • anonymous
subract -7 - -7 =0
jim_thompson5910
  • jim_thompson5910
you would add 7x to both sides |dw:1441330350746:dw|
jim_thompson5910
  • jim_thompson5910
|dw:1441330365891:dw|
jim_thompson5910
  • jim_thompson5910
you can think of it as subtracting off -7x -(-7x) = +7x
anonymous
  • anonymous
oh right sorry
jim_thompson5910
  • jim_thompson5910
either way you'll end up with 7x+y = -9
anonymous
  • anonymous
right

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