Answer:
[tex]-14[/tex]
Step-by-step explanation:
Given: Trey's test score average decreased by 14 points this semester.
To find: a signed number to represent this change in average.
Solution:
The decrease can be denoted by minus [tex](-)[/tex] sign and increase can be denoted by plus [tex](+)[/tex] sign.
So, a signed number to represent the change in test score average is [tex]-14[/tex]
