Answer:
option A is correct if operation A is correct make me as brainleylist
Answer:
They are perpendicular lines
Step-by-step explanation:
If one line has slope -8 and the other one has slope 1/8, they must be perpendicular to each other because the condition for perpendicular lines is that the slope of one must be the "opposite of the reciprocal of the slope of the original line."
the opposite of -8 is 8 , and the reciprocal of this is 1/8
Answer:
Rise is a vertical line from 0 to 4
Run is a horizontal line from 0 to 4
Slope of a line is called the gradient.
Additional information:
Gradient =rise/run
= 4/4
= 1
Y=mx +c
Y=1x +4
Y= x+4
But the slope show a negative correlation, so gradient will be negative & it's y = - x + 4.
BTW the rise and run could also be from 4 on the y-axis and down to the 4 on the x-axis.
So, there is two possible triangles you could make.
As a result, the rise is a straight line going up or down ( vertical ) and the run is a straight line going across from left to right (horizontal).
Answer:
Step-by-step explanation:
The formula for determining the confidence interval for the difference of two population means is expressed as
Confidence interval = (x1 - x2) ± z√(s²/n1 + s2²/n2)
Where
x1 = mean sale amount for mail order sales = 82.70
x2 = mean sale amount for internet sales = 66.9
s1 = sample standard deviation for mail order sales = 16.25
s2 = sample standard deviation for internet sales = 20.25
n1 = number of mail order sales = 17
n2 = number of internet sales = 10
For a 99% confidence interval, we would determine the z score from the t distribution table because the number of samples are small
Degree of freedom =
(n1 - 1) + (n2 - 1) = (17 - 1) + (10 - 1) = 25
z = 2.787
Margin of error =
z√(s²/n1 + s2²/n2) = 2.787√(16.25²/17 + 20.25²/10) = 20.956190
I do not know the answer to this i suck at math
