B. 15 because
-18+x=-3
X= -3 + 18
X = 15
Answer: X = 1
Step-by-step explanation:
3 x 
+ 4 + 1 = 
+ 4
First, you would want to cancel out the equal terms, in this case its the +4's
3 x + 1 =
I would also change the into a 1
3 x 1 +1 =
Now multiply and add
3 + 1 =
4 =
divide both sides by 4
x = 1
X= the total questions
x×20%=16. 20%=0.2
so x×0.2=16
solve for x and that is your answer; )
Answer:
The sample size is 4
Step-by-step explanation:
Null hypothesis: The mean is 2
Alternate hypothesis: The mean is less than 2
Mean = 3
sd = sqrt(variance) = sqrt(4) = 2
At 95% confidence level, t-value is 1.960
Assuming the lower bound of the mean is 1.04
Lower bound = mean - (t×sd/√n)
1.04 = 3 - (1.96×2/√n)
3.92/√n = 3 - 1.04
3.92/√n = 1.96
√n = 3.92/1.96
√n = 2
n = 2^2
n = 4
Answer:
x=-2
Step-by-step explanation:
