Answer:

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
sign and increase can be denoted by plus
sign.
So, a signed number to represent the change in test score average is 
Answer: C)
Step-by-step explanation:
My best guss would just try to get x by its self
Answer:
1.8
Step-by-step explanation:
1.8