10. is f 11. is a I dont know for 12 though
Note that the side adjacent to angle XYZ is given (6 cm) and that the hypo is also given (15 cm). Thus, cos XYZ = adj / hyp = 6 cm / 15 cm = 2/5 = 0.4.
XYZ is then arc cos 0.4. Use the arccos function on your calculator to determine XYZ and give XYZ in both degrees and radians.
W-13=15|+13
w=15+13
x=28
<em>Answer: w=28</em>
If 25% is 45 students, then 100% is 180 students. There are 180 students in the entire 7th grade class.