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anonymous

  • one year ago

Given that the line Ax+By+10=0 is parallel to the line 3x+y=7 and meets the line x+4=7 on the x-axis, find the value of A and B..??

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  1. anonymous
    • one year ago
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    How do i do this??

  2. anonymous
    • one year ago
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    @mathmate @jim_thompson5910

  3. anonymous
    • one year ago
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    do u know??

  4. jackthegreatest
    • one year ago
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    maybe...

  5. jackthegreatest
    • one year ago
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    since the lines r parallel, the slope is -3

  6. jackthegreatest
    • one year ago
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    so A is 3

  7. anonymous
    • one year ago
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    wait how A=3

  8. jackthegreatest
    • one year ago
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    because the line is parallel to 3x + y= 7 parallel lines have the same slope

  9. jackthegreatest
    • one year ago
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    B is 1

  10. jackthegreatest
    • one year ago
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    so a=3 and b = 1

  11. jackthegreatest
    • one year ago
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    there r ur answers : )

  12. anonymous
    • one year ago
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    r u sure??

  13. jackthegreatest
    • one year ago
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    yes i am sure, of course i am

  14. anonymous
    • one year ago
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    @jim_thompson5910

  15. jim_thompson5910
    • one year ago
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    jackthegreatest is correct

  16. anonymous
    • one year ago
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    so we take the slope and use it for A?

  17. jim_thompson5910
    • one year ago
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    Anything parallel to Ax+By+10=0 will be of the form Ax+By = C where C is some fixed number Using numbers anything parallel to 3x+y=7 will be in the form 3x+y = C

  18. anonymous
    • one year ago
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    ok and since y=1 we use that for B?

  19. jim_thompson5910
    • one year ago
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    the coefficient for y is 1, yes

  20. anonymous
    • one year ago
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    ok

  21. anonymous
    • one year ago
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    so if we had 4x+5y=7 then A=4 and B=5?

  22. jim_thompson5910
    • one year ago
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    yeah because the left side of a standard form equation stays the same when you have parallel lines

  23. anonymous
    • one year ago
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    ok thank u both.. @jackthegreatest and @jim_thompson5910

  24. jim_thompson5910
    • one year ago
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    np

  25. jackthegreatest
    • one year ago
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    np

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