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## anonymous 5 years ago Help find the x and y intercepts 3x + 5y = 0 5x + 3y = 16

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1. amistre64

x y intercepts? or x and y that they have in common?

2. anonymous

What each have in common

3. amistre64

does it matter how you solve it?

4. anonymous

It is a system

5. anonymous

solved by addition

6. amistre64

3x + 5y = 0 [-5] 5x + 3y = 16 [3] -15x -25y = 0 15x + 9y = 48 ---------------- -16y = 48 y = -3

7. amistre64

i think addition is the same thing as elimination....right?

8. 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

9. amistre64

3x + 5y = 0 [-3] 5x + 3y = 16 [5] -9x -15y = 0 25x +15y = 80 -------------- 16x = 80 x = 5

10. anonymous

Can I find Y by using 3x + 5y = 0 ?

11. amistre64

once you find a solid value for a variable; you can just use it in an equation to find the other...

12. anonymous

I got +3 when I used 3x + 5y = 0

13. amistre64

no you dint lol

14. amistre64

3x + 5y = 0 3(5) + 5y = 0 15 +5y = 0 5y = -15 y = -15/5 y = -3

15. anonymous

Whoops! I forgot to add the - sign! Thanks :D

16. 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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