Answer:

Step-by-step explanation:
Let x = number of books that Hannah donated
We know that the number of students is 150 and the total number of books is represented by b, we can write that as:
Average number of books donated by each student = 
Now we know that Hannah donated 3 times as much as the average. We can write that as:

The purpose of a cash budget is to help financial managers to get a better understanding of the timing of cash flows.
The cash budget will make it easier for the managers to monitor whether the current cash flow is enough to fund all companies' operation and to determine whether they need to make any changes in their departments.
Here is the answer I hope it helps
That expression is the expected value of your winnings, or "the average amount you will win (or lose) per game in the long run".
81 cubic feet are in 3 cubic yards.