There are 70 historical fiction books in the school library. Historical fiction books make up 1/10 of the library's collection. The equation 1/10b= 70 can be used to find out how many books in library's collection

There are 700 books in Library Collections.

Step-by-step explanation:

Given:

Number of historical books = 70

The equation used to find the totals number of books in library collection.

where b⇒ Total number of books in library collections.

We need to find the Total number of books in library collections.

Solution:

Now by solving the above equation we get;

First we will multiply both side by 10 we get;

Hence there are 700 books in Library Collections.

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.