A. 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30 and 60 are factors of 60. 1 and 60 could be omitted as being trivial.
b. 10 books and 6 shelves if all shelves are used. 12 books and 5 shelves if one shelf is left empty. 15 books and 4 shelves if two shelves are unused. 20 books on 3 shelves. 30 books on 2 shelves.
c. 57 different arrangements.
d. 10 books: 1 arrangement; 12 books: 6 arrangements; 15 books: 15 arrangements; 20 books: 20 arrangements; 30 books: 15 arrangements. Total arrangements=1+6+15+20+15=57 arrangements.
e. 10 books on each of the 6 shelves.
Answer:
A
Step-by-step explanation:
In this problem you'd simply distribute the 10. So 10x15 and 10*n
150+10n
Answer:
B
Step-by-step explanation:

The correct answer is C. 4 1/4
all you have to do is multiply 5 2/3 and 3/4 in a calculator.
Answer:
perimeter =32x+14
Step-by-step explanation:
perimeter = 19x+7x+6x+14
=26x+6x+14
=32x+14