Answer:
Slope = (Y2 - Y1) / (X2 -X1)
Slope = (8 -10) / (5 -2)
Slope = -2 / 3
There different bcuz the denominator is the bottom number when u multiply or divide a fraction when u find a common number out of the 2 bottom ones
there alike bcuz they both r numbers in common with the number u r working with.
Answer:
the answer is x is 3 and y is 6
Answer:
a) The 90% confidence interval for the mean noise level at such locations
(112.46 , 163.54)
b) The critical value that should be used in constructing the confidence interval
Z₀.₁₀ = 1.645
Step-by-step explanation:
<u><em>Step(i)</em></u> :-
Noise levels at 3 airports were measured in decibels yielding the following data
108 146 160
Mean of given data

x : 108 146 160
x-x⁻ : -30 8 22
(x-x⁻ )² : 900 64 484
Variance σ ² = ∑(x-x⁻ )²/ n-1
= 
Standard deviation
σ = √724 = 26.90
<u><em>Step(ii):</em></u>-
The 90% confidence interval for the mean noise level at such locations

The critical value that should be used in constructing the confidence interval
Z₀.₁₀ = 1.645

( 138 - 25.54 , 138 + 25.54 )
(112.46 , 163.54)
Answer:
The value of Z = 0.3066... Or 0.31.
Step-by-step explanation:
The formula of direct proportional is a=kb (where k is constant). Given that a=z=0.2 and b=x=15, equation is 0.2=15k,
k=0.2/15
k=0.0133333333333
If x is 23 then what is z?
z=0.0133333333333(23)
z=0.3066666 or 0.31