In a small town, 10 residents move to new cities each year for 3 years. The following equation is written to represent the situation:
(−10)⋅3=−30
Which of the following best explains the meaning of −30
in the equation?
Responses
A −30
residents leave the town.negative 30 residents leave the town.
B There are −30
residents in the town.There are negative 30 residents in the town.
C The change in the number of residents per year is −30
.The change in the number of residents per year is negative 30.
D The total change in the number of residents in the town due to people moving away is −30
.
B. There are −30 residents in the town. There are negative 30 residents in the town.
The equation (-10) * 3 = -30 represents how many residents are leaving the town over the course of 3 years. The result of -30 means that there are a total of -30 residents in the town, which indicates a decrease in population.