Find the value of x.
A.124
B.57
C.72
D.90

9514 1404 393

  x = 90°

Step-by-step explanation:

Half the sum of x and 120° is the angle where the chords cross, 105°. Then ...

  105° = (1/2)(x +120°)

  210° = x + 120°

  210° -120° = x = 90°

Additional comment

z is the arc that finishes the circle: 360° -90° -68° -120° = 82°.

no

step-by-step explanation:

2-7=-5

7-2=5

when you combing like terms for ech expression, 5 and -5. these numbers are not equal to each other.