1. 5 inches
2. 18 2/3 ft. (19)
Answer:

Step-by-step explanation:
Remember that

Let
x ----> the total cost of the books
we know that
The total cost of the book multiplied by 0.65 must be equal to $438.75
so
The linear equation that represent this situation is

solve for x

Answer:
Step-by-step explanation:(