Last month customers at a gift shop bought 40 birthday cards 19 congratulation cards 20 holiday day cards and 21 you cards . suppose 125 customers buy greeting cards next month . how many would you expect to buy a birthday card ?

They would buy already 23 birthday cards.

what does x eaqual

step-by-step explanation:

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.