It takes 6 kg of wheat to obtain 8 kg of flour and 12 kg of flour to obtain 9 kg of bread. How much wheat do you need to make 84 kg of bread?

56 kg of wheat.

Step-by-step explanation:

84 kg of bread is 9 1/3 greater than 9 kg of bread meaning we can multiply the ingredients by 9 1/3 to find the amount of wheat needed to make 84 kg of bread.

6 kg of wheat · 9 1/3 = 56 kg of wheat

∠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°