Gillian purchased 25 books at the library book sale. each hardcover book cost $1.50, and each paperback book cost $0.50. gillian spent a total of $26.50. the book costs can be represented by the system of equations below.

h + p = 25
1.50h + 0.50p = 26.50
how many paperback books did gillian buy?

Number of books did Gillian buy is 11.

Step-by-step explanation:    

Given : Gillian purchased 25 books at the library book sale. Each hardcover book cost $1.50, and each paperback book cost $0.50. Gillian spent a total of $26.50.

To find : How many paperback books did Gillian buy?

Solution :

The book costs can be represented by the system of equations below.

......(1)

......(2)

Solving the system of equations by substitution method

Substitute h=25-p from (1) into (2)

Substitute back in equation (1),

i.e. there are 11 paperback books and 14 hardcover books.

Therefore, Number of books did Gillian buy is 11.

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step-by-step explanation:

ratio is 2 : 9

the answer is three

13.5 : 3