x + x-5 + x +23 = 180
combine like terms:
3x +18 = 180
subtract 18 from each side:
3x = 162
divide both sides by 3
x = 162 / 3 = 54
Angle x = 54 degrees
Angle x-5 = 54-5 = 49 degrees
Angle x +23 = 54 +23 = 77 degrees
Hi
The answer is <em>D. 39 degrees. </em>The area where b is shows an acute angle. The only answer shown with an acute angle is 39. 141 and 180 are obtuse angles, and 90 is a right angle.
Answer:
412 squares
Step-by-step explanation:
16o
140
172
412
trust me on this
Answers:
- cos(2theta) = -119/169
- cos(theta) = -5/13
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The given info is:
- sin(theta) = 12/13
- theta is in quadrant II
From that, we can use the pythagorean trig identity to find that cos(theta) = -5/13. Keep in mind that cosine is negative in quadrant II.
Now use the trig identity below to compute cos(2theta)

Other options you could use are these identities

or
