Answer: False
Explanation:
By definition, the z-score of the random variable, x, is

where
μ = the population mean
σ = the population standard deviation
Because only the sample mean and the sample standard deviations are known, we cannot calculate the z-score. Instead, we can calculate the Student t-test statistic.
The x intercept is 10 (: and to find it you would plug 0 in for the y intercept since you're looking for the x so it would be 3x=30 and then divide it which gives you 10 (:
The answer is C. Hope this helps :)
Answer:
The distance is 5.8x10^7 km
The diameter is 2.5x10^-3 cm
and before a comparison is made both numbers have to be written in the same unit. meaning the km has to be converted to cm or vice versa.
Answer:
A
Step-by-step explanation:
Given
x² - 14x = 0
To complete the square
add ( half the coefficient of the x- term )² to both sides
x² + 2(- 7)x + 49 = 0 + 49
(x - 7)² = 49 ( take the square root of both sides )
x - 7 = ±
= ± 7 ( add 7 to both sides )
x = 7 ± 7 , thus
x = 7 + 7 = 14 or x = 7 - 7 = 0