For this case we have that the original price of the book is given by:
$ 19.75
The customer has a coupon to save part of the price of the book.
Therefore, the customer will pay

Where,
x: value of the customer coupon.
We know that the customer has a coupon that has a value of $ 4.50.
Substituting values we have:

Answer:
she will pay for the book 15.25 $


✒ 
Plugging in the value "a = 7" and "b = -2" in the above expression, we have
✒ 
✒ 

Answer:
90
Step-by-step explanation:
Answer:
b
Step-by-step explanation:
1 to 4; 1 for every 4; 1/4;