What is the common denominator of 1/a+1/b in the complex fraction 1/a-1/b/1/a+1/b

common denominator is ab.

Step-by-step explanation:

Given : ;  complex fraction  .    

To find : What is the common denominator.

Solution : We have given that  .    

For this, we subtract fractions in the numerator and the sum of fractions in the denominator.

 .

We observe that the common denominator is given by the product:  ab

Therefore, common denominator is ab.

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:

answer: 1722

step-by-step explanation:

given: the mass of saturn=

the mass of mercury=

the number of times the mass of saturn is greater than the mass of mercury

hence, the mass of saturn is 1722 times greater than the mass of mercury.