Question

Colin drove 45 minutes to the airport. He arrived 90 minutes before his flight departed, and then he spent 70 minutes in the air. Once he landed, Colin spent 20 minutes gathering his luggage, and then he drove 35 minutes to his hotel. What must be true of any expression that represents the total time that Colin spent traveling from his house to the hotel?
ANSWERS
The numbers can be added in any order.
The number 45 must be the first addend, and 35 must be the last addend.
The numbers must be added in the order 45, 90, 70, 20, and 35.
The numbers must be added in either the order 45, 90, 70, 20, and 35 or the order 35, 20, 70, 90, and 45.

Answer 1

Answer: The numbers can be added in any order.

Step-by-step explanation:

To calculate the total time that Colin spent traveling from his house to the hotel the numbers can be added in any order because time is a scalar quantity. It cannot be negative.

A scalar quantity is the quantity which has only magnitude but not the directions. For example temperature (vector quantity), it can be both positive and negative but time cannot be negative, thus it is a scalar quantity.

Answer 2

Answer:

the numbers can be added in order....

Step-by-step explanation: