Respuesta :
Answer:
a) The ratio of used books to new books is of [tex]\frac{9}{4}[/tex].
b) The ratio of all books on the shelf to used books is of [tex]\frac{13}{9}[/tex]
Step-by-step explanation:
Ratio of a to b:
The ratio of a to b is given by:
[tex]\frac{a}{b}[/tex]
Ratio of b to a:
The ratio of b to a is given by:
[tex]\frac{b}{a}[/tex]
In this question:
13 books, 9 used, 4 new.
(a) What is the ratio of used books to new books?
9 used, 4 new. So
The ratio of used books to new books is of [tex]\frac{9}{4}[/tex].
(b) What is the ratio of all books on the shelf to used books?
13 books on the shelf, 9 used. So
The ratio of all books on the shelf to used books is of [tex]\frac{13}{9}[/tex]
