= root 45 - 3 root 20 + 4 root 5
= root 9 * root 5 - 3 * root 4 * root 5 + 4 root 5
=3 root 5 - 3 * 2 * root 5 + 4 root 5
= root 5 ( 3 - 6 + 4 )
= root 5 *1
= root 5
He would need 10.6 shelves. (Also what kind of shelf can only hold 9 books?)
Answer:
35-b
Step-by-step explanation:
the answer is 35-b
