Please help the question is in the picture

C

Step-by-step explanation:

You need to substitute x for 2.5. After that, multiply 101 and 2.5 to get 252.5. Then, add 252.5 and 207.85 to get 460.35.

Since there are 3 books, we can multiply 16 x 3 to get the price. 16 x 3 = 48, and 15% of 48 equals 7.2, because 0.15 x 48 = 7.2. But we are not done yet now, we need to subtract 48 - 7.2 to get our final answer. 48 - 7.2 = 40.8, so 40.8 is our final answer. :)