Homework Help: Math(can you just check my answer please)

Posted by Sofie on Wednesday, April 20, 2011 at 3:02pm.

Lines x and y intersect to form angles 1,2,3, and 4. The measure of angle 3 is (3x - 9) and angle 4 is 111 degrees.
Can you help me make a equation
I think the equation is 3x-9 + 11 = 180
is this correct

Math(can you just check my answer please) - MathMate, Thursday, April 21, 2011 at 8:41am
Implied in the question is that angles 1,2,3,4 are in either clockwise or counter-clockwise order.

If that is true, then angles 3 and 4 are adjacent and supplementary (add up to 180°).

The proposed equation is correct if the two angles are adjacent:
3x-9 + 111 = 180
(note correction in typo).
Math(can you just check my answer please) - Michelle, Friday, November 16, 2012 at 4:04pm
＄LMN and ＄NMO are adjacent angles that share MN
冨冨冨冨冣
as a side. Together, those two angles form ＄LMO.
What equation can you write that shows the relationship between m＄LMN , m＄NMO , and m＄LMO

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