A turtle laid 70 eggs of which 9/15 hatched How many eggs did not hatch?

28 eggs

Step-by-step explanation:

Total no of eggs laid by a turtle = 70

Hatched eggs fraction

We need to find the eggs that did not hatch.

Hatched eggs,

Not hatched eggs = total eggs - hatched eggs

Not hatched eggs = 70 - 42

= 28

Hence, 28 eggs did not hatched.

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations:

(a) the volume of the cone is 20/3 in3

hence, option a is correct.