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tthomas0557

  • 2 years ago

Determine if the graphs of the given equations are parallel. y=2x+7 7y+2x=4 what is the slope of the line y=2x+7 what is the slope of the line 7y+2x=4 Are the graphs parallel?

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  1. surdawi
    • 2 years ago
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    slope form y = mx + b; m is the slope

  2. Fox375
    • 2 years ago
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    what is the slope of the line 7y+2x=4

  3. tthomas0557
    • 2 years ago
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    Honestly, I am seriosly lost on this question.. I dont even know where to start

  4. tthomas0557
    • 2 years ago
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    so for the first one 2 is the slope?

  5. precal
    • 2 years ago
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    if the slopes are the same, the lines are parallel

  6. surdawi
    • 2 years ago
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    ok try solving for y 7y+2x=4

  7. tthomas0557
    • 2 years ago
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    I feel silly but what would be my first step?

  8. surdawi
    • 2 years ago
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    subtract 2x from both sides

  9. tthomas0557
    • 2 years ago
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    The slope would be -2?

  10. tthomas0557
    • 2 years ago
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    for the first?

  11. surdawi
    • 2 years ago
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    nope write the whole thing 1st equation slope is 2

  12. tthomas0557
    • 2 years ago
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    ok..... so the second would be the same then?

  13. surdawi
    • 2 years ago
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    no, try solving for y, will help u

  14. tthomas0557
    • 2 years ago
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    oh my ok.. let me work this out.. Just a sec

  15. tthomas0557
    • 2 years ago
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    It would be 4?

  16. surdawi
    • 2 years ago
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    nope 7y+2x=4 subtract 2x from both sides

  17. tthomas0557
    • 2 years ago
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    sorry I thought I did.. this is embaressing ... ok just a sec

  18. tthomas0557
    • 2 years ago
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    For some reason I just keep getting 2

  19. surdawi
    • 2 years ago
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    7y+2x=4 -2x -2x 7y = -2x + 4 is that correct?

  20. tthomas0557
    • 2 years ago
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    (4-2x)/7

  21. tthomas0557
    • 2 years ago
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    yes

  22. surdawi
    • 2 years ago
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    correct one extra step y = -2/7x + 4/7 whats the slope

  23. tthomas0557
    • 2 years ago
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    is it undefined?

  24. surdawi
    • 2 years ago
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    y = mx + b m = -2/7

  25. tthomas0557
    • 2 years ago
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    I dont see where I went wrong....

  26. surdawi
    • 2 years ago
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    |dw:1355175754668:dw|

  27. tthomas0557
    • 2 years ago
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    Oh ok I see that now. WOW how confusing... I hope I can handle the next on my own.. Thanks for your generous help...

  28. tthomas0557
    • 2 years ago
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    Ok so how would I go about doing a question that asked me this... slope intercept equation of the line whose graph is parallel to y=2x-5 and has te y-interceot (0,9) There is no way I could do that one on my own!

  29. surdawi
    • 2 years ago
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    they are parallel so the slope will stay the same y - y1 = m(x -x1) y - 9 = 2*(x-0) y - 9 = 2x +9 +9 y = 2x + 9

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