29+18=47 17-8=9+47=56÷8=7 so its 7
After canceling out the x^2 and all the other fun stuff, you should get (x+4)/(x-1)
Answer:
Step-by-step explanation:
hello :
f(x) = 3x - 5 and g(x) = x² + 2
(f+ g)(x)= f(x)+g(x) = 3x-5 +x²+2
(f+ g)(x).= x²+3x-3
Answer:
a) margin of error ME = 5.77
b) Margin of error becomes smaller
Step-by-step explanation:
Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.
The confidence interval of a statistical data can be written as.
x+/-zr/√n
x+/-ME
Where margin of error ME = zr/√n
a)
Given that;
Mean = x
Standard deviation r = 25
Number of samples n = 72
Confidence interval = 95%
z(at 95% confidence) = 1.96
Substituting the values we have;
ME = 1.96(25/√72)
ME = 1.96(2.946278254943)
ME = 5.774705379690
ME = 5.77
b)
For n = 89
ME = 1.96(25/√89)
ME = 1.96(2.649994700015)
ME = 5.193989612031
ME = 5.19
5.19 is smaller than 5.77 in a) above. So,
Margin of error becomes smaller
