Answer: -6.5
Step-by-step explanation:
To find the number between them,find their average or mean .
-6 + -7 = -13
-13/2 = -6.5
The number between them is -6.5
Parentheses first -4+-8= -12(1)= -12
= -12
Answer:
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F(x) represents how many books in total and x represents the number of days
