Donavin would need 383 protective sheets
STEP BY STEP
If each sheet can hold 15 cards you would take 5,734 divided by 15 which gets you 382.26666
You would round up so all the cards have sheets
"Integer" I think! As all rational numbers can be written as integer fractions.
Linear equations in one variables shows always graph in straight line,
For ex: x = 3, y = 4, x = -1.5, y = -2/3
Also two variables linear equations with degree of 0 or 1 (Each term) shows always graph in straight line,
For ex: x + y = 5, 2x - 4y = 7 etc.
The answer would be 20 books
4x5=20