15. In a class if 75% of students own a bicycle, then percent of the students do not have bicycles is???

100%-75%= 25%

Step-by-step explanation:

100%= whole class

75%=students that own a bicycle

25%=students that do not have a bicycle

∠acb = 8°

step-by-step explanation:

∠xba lies on the circle and is half the measure of the intercepted arc ax

hence

measure of arc ax = 2 × 42° = 84°

∠acb is outside the circle and is

∠acb = (arcab - arcax ), hence

∠acb = 0.5 (100 - 84) = 0.5 × 16° = 8°

the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation: