anonymous
  • anonymous
find the value of x.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
|dw:1380238750511:dw|
anonymous
  • anonymous
are these in degrees?
anonymous
  • anonymous
Is that a right angle?

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anonymous
  • anonymous
yeah
anonymous
  • anonymous
yeah they are in degrees
anonymous
  • anonymous
3x-9=90 solving for x gives x=33 making the second one 40 degrees
anonymous
  • anonymous
That is if that 3x-9 is the angle of the vertical line to the ground and the angle is "right"
anonymous
  • anonymous
3x-9 is a right angle
Directrix
  • Directrix
@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.
Directrix
  • Directrix
|dw:1380239569613:dw|
anonymous
  • anonymous
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.
anonymous
  • anonymous
so i would go 3*23-9 = 60 23+7=30
anonymous
  • anonymous
Yep should be that.
anonymous
  • anonymous
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
anonymous
  • anonymous
right angels give you 90 derees so it should add up to 90 degrees

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