Answer:
Step-by-step explanation:
5. The opposite angles of a cyclic quadrilateral sum to 180 so
9y + 5 + 18x + 4 = 180 and
9y - 9 + 21x + 6 = 180
Solve this system to find x and y.
7. Solved in the same way.
Have to go right now so i cant help you any further.
Answer:
X=4 y=11
Step-by-step explanation:
9y+5+18x+4=180 9y=171-18x
9y-9+21x+6=180 9y=183-21x
171-18x=183-21x
3x=12 x=4 9y=171-72=99 y=11
