Fred and Barney go to a baseball game on Friday. They buy 4 hot dogs and 8 burgers and spend no more than $40. On Saturday they return to the same ballpark and purchase only 2 hot dogs and 5 burgers and spend no more
than $20. Which of the following cannot be a solution?

How do you find principle and simple interest

Saline iv fluid bags cost $64.20 for 24, 1000 ml bags from one supplier. a new supplier sells 500 ml bags for $2 each. the hospital uses about 10,000, 1000 ml bags each month. nurses report that about half of the bags are more than half full when they are discarded. if you are going to use only one supplier, which size bag provides the best deal, and how much will you save each month? compare the cost of the new supplier to the current one.

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?