Question

fill in the blanks below.
(a) a car corporation produced 1900 more cars this month than last. write a signed number to represent this month’s change in production.
(d) the population of a certain city decreased by 100 people. write a signed number to represent this population change.

Explanation:

Step1: Analyze part (a)

A car corporation produced 1900 more cars this month than last. An increase is represented by a positive signed number. So the change in production is +1900 (or 1900, since positive sign can be implied).

Step2: Analyze part (d)

The population of a city decreased by 1000 people. A decrease is represented by a negative signed number. So the population change is -1000.

Answer:

(a) \( +1900 \) (or \( 1900 \))
(d) \( -1000 \)