If a : b = 5 : 3 , find 5a - 3b / 5a +3b

Step-by-step explanation:

Given

a : b = 5 : 3

or

a = 5 and b = 3

Now

= 5a - 3b

5a + 3b

= 5 * 5 - 3 * 3

5 * 5 + 3 * 3

= 25 - 9

25 +9

= 16/ 34

Dividing both numerator and denominator by 2 we get

= 8/17

∠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°