64 copies.
1.) Divide 40 by 5 (you get 8)
2.) 8 is the number of copies that fits on a 1 foot shelf, so to find how many copies would fit on an 8 foot shelf, simply multiply 8(book copies) by 8( an 8 foot shelf).
3.) 8 times 8 is 64, so your answer is 64 books will fit perfectly on an 8 foot shelf. Hope this helped!
Answer:
Here's one way
Step-by-step explanation:
13) multiply each term by 24
9x - 32x = 96
-23x = 96, divide both sides by -23
x = -4.17
4=5x-3
<span>7=5x </span>
<span>7/5=x </span>
<span>1.4=x</span>