17/16 is the answer since 1/2 is equal to 8/16. 8+9 is 17
The value of c that makes up a perfect square trinomial is
9x^2 - 12x +c
Arc PR is 156 degrees. Since both angles are are making the forming arc they should be congruent. You can put (5x+23)=(9x-21) which is x=11.
Then you plug in 11 into your equation; 5(11)+23=78.
Since the vertex is on the outside of the circle then the arc is forms is 2 times the value of the angle.
78(2)=156
Answer: d
Step-by-step explanation:
