Answer:
1. 7
2. 54÷2=27
only this I know please put brainlest
Answer: 20.2 mph
Step-by-step explanation:
Given
Train travels 10.1 miles in half an hour i.e.
Distance
time
we know,
Insert the values
A) a = (1,-3) b = (-4,-4)
B) a = (-1,3) b = (4,4)
Hope this helps! ;)
Answer:
2 sqrt(2x-1)
Step-by-step explanation:
f(x) = sqrt(x+7)
g(x) = 8x-11
f(g(x))=
Place g(x) in for x in the function f(x)
f(g(x)) = sqrt( 8x-11 +7)
= sqrt( 8x -4)
Factor out 4
= sqrt( 4(2x-1)
= 2 sqrt(2x-1)
Answer: (a) (602.95,705.37)
(b) 33
Step-by-step explanation:
(a) Given : Sample size :
Sample mean :
Standard deviation :
Significance level :
Critical value :
The confidence interval for population mean is given by :-
Hence, the 95% (two-sided) confidence interval for true average level in the population of all homes from which the sample was selected.
(b) Given : Standard deviation :
Margin of error :
Significance level :
Critical value :
The formula to calculate the sample size is given by :-
Hence, the minimum required sample size would be 33.