First of all, I find it easiest to write n equation.
3 / 15 x 8 =
Now that we have an equation, we can figure out a solution.
3 / 15 = 5
5 x 8 = 40
So 8 DVD's would cost $40.00.
Step-by-step explanation:
If (5) = 3
Then (10) = 6
Because 5 x 2 = 10 so 3 x 2 = 6
Answer: 
Step-by-step explanation:
Hello from MrBillDoesMath!
Answer:
$3.25
Discussion:
Money spent = paperback's purchased + hardback's covered =
3 (0.25) + 5 (0.50) =
0.75 + 2.50 = $3.25
Regards,
MrB
P.S. I'll be on vacation from Friday, Dec 22 to Jan 2, 2019. Have a Great New Year!