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18 votes
18 votes
(a)Lisa's test score average increased by 11 points this semester.Write a signed number to represent this change in average.(b)Charmaine lost 35 dollars from her pocket.Write a signed number to represent this change.

User Abrahab
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1 Answer

10 votes
10 votes

Answer:

(a). +11

(b). -35

Step-by-step explanation:

(a). An increase in mathematics is represented by a + sign.

Therefore, if we want to represent a score increase by 11 points, well say that the score changed by +11.

Note that if we didn't use + sign, we would use the following sentence to describe the same change.

Lisa's test score average increased by 11 points.

If on the other hand, we used the + sign, we'd say

Lisa's test score average changed by +11 points.

(b). A decrease in mathematics is represented by a - sign.

Therefore, if we want to describe a loss of $35 from Charmaine's pocket, we'd say the following.

Charmaine's pocket money changed by - 35 dollars.

User Daniel Schuler
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