Answer:
X+Y=26
X-Y=12
Step-by-step explanation:
fiction books= X
non fiction books= Y
then,
fiction books= X
non fiction books = X-12
but Y= X - 12
from. the statement,
X+Y = 26
X-Y=12
He would need to pay $44 for the purchase because
10% x $40 = $4
$40 + $4 = $44
hope this helped ((:
For this case we have:
By properties of the radicals 
So:
.
Now, for power properties we have:

Thus, 
So:
in its radical form
Answer:
in its simplest form.
in its radical form
Answer:
-15
Step-by-step explanation:
the new temperature since it went down
-12-3= -15
Answer:
4
Step-by-step explanation:
64/16=4