A hibernating animal lost 9 pounds.
Write a signed number to represent this weight change.
(b) David received 50 dollars.
Write a signed number to represent this change.
(a) -9 pounds
(b) +50 dollars
(a) The hibernating animal lost 9 pounds, so the signed number to represent this weight change would be -9.
(b) David received 50 dollars, so the signed number to represent this change would be +50.
To represent the weight change of a hibernating animal losing 9 pounds, we use a negative sign since it is a loss. Therefore, the signed number to represent this weight change is -9.
To represent David receiving 50 dollars, we use a positive sign since it is a gain. Therefore, the signed number to represent this change is +50.