Answer:
d. Twenty-five cars are randomly selected with the new transmission and 25 with the old transmission.
Step-by-step explanation:
A hypothesis test on the difference between the means must satisfy the following conditions
1) the samples must be randomly selected
2) each sample must have a known standard deviation
3) the samples must be independent
4) the samples must be from normal distribution
Hence only part d gives the right answer.
The answer is actually 164.1 because I learned how to multiply this. :)
Answer:

Step-by-step explanation:
we have
Line 1

Equation in slope intercept form
The slope is equal to

Line 2


Equation in slope intercept form
The slope is equal to

we know that
If two lines are perpendicular, then their slopes are opposite reciprocal (the product of the slopes is equal to -1)
so

substitute


Answer:
The solutions to the quadratic function are:

Step-by-step explanation:
Given the function

Let us determine all possible solutions for f(x) = 0

switch both sides

subtract 3 from both sides

simplify

Divide both sides by 4


Add (-1/2)² to both sides




solving

∵ 
as

so

Add 1/2 to both sides


also solving


Add 1/2 to both sides


Therefore, the solutions to the quadratic function are:
