What I did for this question is I set up ans equation. 5x-7 + 3x+11 = 180 and I added the Xs and and I added 11 to -7. Then I got 8x+4=180. I then "-4" on both sides and then divided 8 by 176. Getting X as 22. We now know X and we put 22 into the equation for D which is "3x+11" getting 77 degrees. Hope this helped!
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Explanation:</h2>
The yard, whose symbol is yd, is standardized as 0.9144 meters since 1959. The unit system that use it is both the imperial and the US units. On the other hand, the foot, whose symbol is ft, is standardized as 0.3048 meter. It is also used by the imperial and US units. The relationship between these two units is:

The circumference of the circle is 34.54. and the area of the square is 49. I hope that is helpful.
Jane has read 108 pages, which leaves 92 pages to read (200 - 108). That is 92/200, which simplifies to 46/100 = 46%. Kevin has 80 pages left, which is 80/200, which simplifies to 40/100 = 40%. Therefore, Jane has got to read 6% more pages, which however is not on here. This could be a mistake in the question.
Draw a diagram
assuming you are directly over the base of the tree
we need to find the ratio between the adjacent angle and oposite angle
adjacent angle is the disatnce from frisbee to base of tree
oposite angle is 50ft
so
tan=oposite/adjacent
tan(60°)=50/?
?tan(60°)=50
?=50/tan(60°)
use your calculator
?≈28.8675
so about 29ft away from the base of the tree is the frisbee