Salma has 8 bottles of PEPSI which contain 13 litres in total. To get 18.5 litres of PEPSI, how many bottles she should have?

!2 bottles

Step-by-step explanation:

Given

Required:

Number of bottles for 18.5 liters

Represent this with x.

So:

Cross Multiply

Hence, she needs 12 bottles

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:

n

step-by-step explanation: