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leroysgurl15

  • one year ago

find the value of x.

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  1. leroysgurl15
    • one year ago
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    |dw:1380238750511:dw|

  2. Georgia_peach
    • one year ago
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    are these in degrees?

  3. hwtrain
    • one year ago
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    Is that a right angle?

  4. leroysgurl15
    • one year ago
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    yeah

  5. leroysgurl15
    • one year ago
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    yeah they are in degrees

  6. bcdrane42
    • one year ago
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    3x-9=90 solving for x gives x=33 making the second one 40 degrees

  7. bcdrane42
    • one year ago
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    That is if that 3x-9 is the angle of the vertical line to the ground and the angle is "right"

  8. leroysgurl15
    • one year ago
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    3x-9 is a right angle

  9. Directrix
    • one year ago
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    @bcdrane42 Would it be correct to write: 3x - 9 + x + 7 = 90 because perpendicular lines meet to form right angles and right angles have a measure of 90. There's one more theorem that goes with that.

  10. Directrix
    • one year ago
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    |dw:1380239569613:dw|

  11. hwtrain
    • one year ago
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    Well you have to combine the 3x-9 and x+7 = to 90 3x-9+x+7=90 combine like terms 4x=92 Divide to get x by itself x=23 Then plug that back into x to get the two other angles.

  12. leroysgurl15
    • one year ago
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    so i would go 3*23-9 = 60 23+7=30

  13. hwtrain
    • one year ago
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    Yep should be that.

  14. bcdrane42
    • one year ago
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    Actually it looks like 3x-9 represents the angle between the vertical line and the 2ND LINE, not the ground. That would make what directx says correct: 3x-9+x+7=90 solving for x gives you: 23

  15. Georgia_peach
    • one year ago
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    right angels give you 90 derees so it should add up to 90 degrees

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