The area of of a triangle A varies jointly as its base, b and altitude n.

step-by-step explanation: you take each of the numbers and divide by the amount then you take the range

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:

4 + 5 7/9= 9 7/9

step-by-step explanation:

600,000,000,000, or 6e14

step-by-step explanation: