A shipping company charged a customer $25 to ship some small boxes and some large boxes. The equation above represents

Question

A shipping company charged a customer $25 to ship some small boxes and some large boxes. The equation above represents the relationship between a , the number of small boxes, and b , the number of large boxes, the customer had shipped. If the customer had 3 small boxes shipped, how many large boxes were shipped?

Accepted Answer

Choice B is correct. It&rsquo;s given that a represents the number of small boxes and b represents the number of large boxes the customer had shipped. If the customer had 3 small boxes shipped, then . Substituting 3 for a in the equation yields or . Subtracting 9 from both sides of the equation yields . Dividing both sides of this equation by 4 yields . Therefore, the customer had 4 large boxes shipped. Choices A, C, and D are incorrect. If the number of large boxes shipped is 3, then . Substituting 3 for b in the given equation yields or . Subtracting 12 from both sides of the equation and then dividing by 3 yields . However, it&rsquo;s given that the number of small boxes shipped, a , is 3, not , so b cannot equal 3. Similarly, if or , then or , respectively, which is also not true.

Question a-ship