The intersection of two planes is a line. :) Hope it works.
Answer:
Null hypothesis is rejected. Standard deviation is > 8 miles per hour
Step-by-step explanation:
σ [Population standard deviation] = 8 , s [sample standard deviation] = s
n [no of items] = 8
H0 [Null] : σ = 8 ; H1 [Alternate - Right Tail] : σ > 8
χ2 = (n - 1) . s^2 / σ^2
= 49 x (10.5)^2 / 82 = 5402.25 / 64
χ2 = 84.410
df [degree of freedom] = n -1 = 50 - 1 = 49
P value (χ^2 49 > 84.410) = 0.00125
p = 0.0013
p < α ie 0.05
So, H0 is rejected
Hence we state that standard deviation is > 8 miles per hpur
All you have to do is subtract 38 from 45 to get 7 as your answer.
Answer:
!%)O
Step-by-step explanation:
:)
Answer:
- 2x + 18
Step-by-step explanation:
Given
4x - 2(3x - 9) ← distribute
= 4x - 6x + 18 ← collect like terms
= - 2x + 18 OR 18 - 2x
