Question

in a small town, 10 residents move to new cities each year for 3 years. the equation below is written to represent the situation: (-10)·3 = -30 which description best explains the meaning of -30 in the equation? a -30 residents leave the town. b there are -30 residents in the town. c the change in the number of residents per year is -30. d the total change in the number of residents in the town due to people moving away is -30.

Explanation:

-10 represents the number of residents leaving per year (negative because it's a decrease). Multiplying by 3 (years) gives the total change. Option A is incorrect as it's total change not just leaving. Option B is wrong as number of residents can't be negative. Option C is about per - year change which is -10. Option D correctly states the total change due to moving away.

Answer:

D. The total change in the number of residents in the town due to people moving away is −30.