Answer:
Tstatistic = - 3.068
Step-by-step explanation:
Given the data: 9.7% 7.4% 5.9% 7.7% 7.5% 8.9%
Mean titanium > 9.5%
Test statistic :
(m - μ) / (s/√n)
From the data: obtain the sample mean and standard deviation
From the data given ;
Calculate the same mean and standard deviation :
Using calculator :
Sample mean (m) = ΣX / n
Sample size (n) = 6
m = 47.1 / 6 = 7.85
Standard deviation (s) :
Using calculator = 1.317
Hence,
(m - μ) / (s/√n)
Tstatistic = (7.85 - 9.5) / (1.317/√6)
Tstatistic = - 1.65 / 0.5376629
Tstatistic = - 3.068
Answer:
x+4y=8 is the correct answer
Step-by-step explanation:
Answer:
(4/x)-1
Step-by-step explanation:
The quotient of 4 and the number x means we are dividing 4 by x, so we get 4/x
Then we have the 'one less than' part, meaning we subtract one from (4/x), so we get (4/x)-1
Hope this helps
Let x ft be the length of the ladder, then the distance from the ground to the top of it will be x-1 ft.
If the distance from the bottom of the ladder to the building is 3 ft, then we can apply Pythagoras:
x² = (x-1)² + 3² . Expand:
x² = x² - 2x + 1 + 9
x² = x² - 2x + 10
x² - x² = - 2x + 10
0 = - 2x + 10
2x = 10 and x = 5 ft
Answer:
y = -4x + 11
D is correct
Step-by-step explanation:
Write in slope - intercept form, y = mx + b.
Hope this helps :)
