Answer:
the average rate of change should be -10
Step-by-step explanation:
X+8=18 -8 -8
X=10 Value of x is 10
Answer:
-3 and 17
Step-by-step explanation:
Let the number be = x
x - 7 = -10
x = -10 + 7
x = -3
OR
7 - x = -10
- x = -10 - 7
- x = -17
x = -17/-1
x = 17
The two possible numbers are -3 and 17
Answer: 31
Step-by-step explanation:
Formula to find the sample size is given by :_

, where z*= critical value corresponds to confidence level.
= population standard deviation.
E= Margin of error.
As per given , we have

E=1
We know that critical value corresponding to 95% confidence level = z*=1.96
Then, the required sample size would be :



Hence, the required minimum sample size = 31