Answer:
13.4±2.132(1.02/5)
Step-by-step explanation:
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It decreases by 0.5
The original mean was 5.5
The new mean is 5
Answer:
other x values are -5,-4
Step-by-step explanation:
f(x)=0 for x=−6
Apply synthetic division to get the quotient . using that we find other two values of x
-6 1 15 74 120
0 -6 - 54 -120
-------------------------------------------------
1 9 20 0
the quotient is 
now factor the left hand side, product is 20 and sum is 9

So other x values are -5,-4
Answer:
b = -1.4
Step-by-step explanation: