To find the cost of each book, you need to divide the money spent on all of the books by the number of books.
$39 / 10 = $3.90 per book
Answer:
Step-by-step explanation:

the error was in not take the root of the number correctly
the student assumes that the root of 144 was equal to 72
72° is the measure of both angles because 144/2= 72°
Answer:
y= 84
Step-by-step explanation:
i just took the quiz.
C it’s what I chose for it