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 
A fraction with the same numerator (number on top) as another but with a smaller denominator (number on bottom) is a larger number. For example 1/2 is bigger than 1/3 which is bigger than 1/4, etc.
Answer:
x1= -6.6 x2= 8.6
Step-by-step explanation: