Plz
find the value of a, b,c, and d.

Step-by-step explanation:

60+b+d=180 (angles on a st. line)

∠d=∠a  (alternate interior angles)

60+∠b+∠a=180 (substituting)

60+∠b+2∠b=180

3∠b=180-60=120

∠b=140/3=40°

a=2b=2×40=80°

a+c=180

80+c=180

∠c=180-80=100°

∠d=∠a=80°

∠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°

191 students play sports and ninety-seven 10th graders were surveyed.

step-by-step explanation: