The 8 in 429.86 has the value of the 8 in 321.58

∠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°

g

step-by-step explanation:

sites:

a)(x-2)^2+(y-1)^2=9

step-by-step explanation:

(picture explains)