anonymous
  • anonymous
Help find the x and y intercepts 3x + 5y = 0 5x + 3y = 16
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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amistre64
  • amistre64
x y intercepts? or x and y that they have in common?
anonymous
  • anonymous
What each have in common
amistre64
  • amistre64
does it matter how you solve it?

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anonymous
  • anonymous
It is a system
anonymous
  • anonymous
solved by addition
amistre64
  • amistre64
3x + 5y = 0 [-5] 5x + 3y = 16 [3] -15x -25y = 0 15x + 9y = 48 ---------------- -16y = 48 y = -3
amistre64
  • amistre64
i think addition is the same thing as elimination....right?
anonymous
  • anonymous
What I did was this (-3)3x + 5y = 0 (5)5x + 3y = 16 -9x - 15x = 0 25x + 15x = 80 16/16 \[\times\] 80/16 I got x = 5
amistre64
  • amistre64
3x + 5y = 0 [-3] 5x + 3y = 16 [5] -9x -15y = 0 25x +15y = 80 -------------- 16x = 80 x = 5
anonymous
  • anonymous
Can I find Y by using 3x + 5y = 0 ?
amistre64
  • amistre64
once you find a solid value for a variable; you can just use it in an equation to find the other...
anonymous
  • anonymous
I got +3 when I used 3x + 5y = 0
amistre64
  • amistre64
no you dint lol
amistre64
  • amistre64
3x + 5y = 0 3(5) + 5y = 0 15 +5y = 0 5y = -15 y = -15/5 y = -3
anonymous
  • anonymous
Whoops! I forgot to add the - sign! Thanks :D
anonymous
  • anonymous
I needed to send you my question so you can understand it better Complete the sales receipt below by finding the prices, the subtotal, the sales tax, and the total. McCOY'S FURNITURE 1 @ 490.00 SOFA 2 @ 60.00 END TABLE 1 @ 360.00

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