Question
(a) Charmaine's test score average decreased by 13 points this semester. Write a signed number to represent this change in average. \( \square \) (b) The temperature rose by 11 degrees Fahrenheit today. Write a signed number to represent this temperature change. \( \square \)
Ask by Wheeler Cross. in the United States
Mar 10,2025
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Tutor-Verified Answer
Answer
**(a)** The change is -13.
**(b)** The change is +11.
Solution
**(a)** Since her test score average decreased by 13 points, the change is negative. Therefore, the signed number is
\[
-13
\]
**(b)** Since the temperature rose by 11 degrees Fahrenheit, the change is positive. Therefore, the signed number is
\[
+11
\]
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Simplify this solution Mind Expander
To represent Charmaine's decrease in average test scores, you would use a signed number of -13. This negative sign indicates a decline in her performance, reflecting that her current average is 13 points lower than before. For the temperature change, you would represent the rise of 11 degrees Fahrenheit with a signed number of +11. The positive sign shows an upward movement in temperature, indicating that it's getting warmer outside—perfect for a lovely day out!
