B) A man sold two books at $375 each. On the first book, he gains 25%and the other, he loses 25%. How much does he gain or lose in the whole
transaction? Also, find the gain or loss percent in the whole transaction

y = 2x

step-by-step explanation:

if you divide each number in the sequence, you'll see that they all have a multiple factor of 2. each number in the series, and any other numbers which may continue, will be multiplied by 2. therefore, y is the next number in the sequence, and x is the current one, so, our formula will be y = 2x.

12cm

the answer is d