What is x? x – 15 = 40
2 answers:
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Question:
Select expression that is mathematically equivalent to
a)
b)
c)
d)
Answer:
Step-by-step explanation:
Given
Required
Determine its equivalent
Start by writing y - z in bracket;
becomes
When - is used as divide, it is equivalent to /
The given expression can then be rewritten as
Hence;
<em /><em> is equivalent to </em>
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Answer: -2.10
Step-by-step explanation:
Given :
Sample size : n= 50, since the sample size is greater than 30 , so we apply z-test.
Sample mean :
Standard deviation :
The test statistic for population mean :-
i.e.
Hence, the value of the test statistic = -2.10
If two lines are perpendicular, then their slopes have a product of -1 or you could say they are opposite signed reciprocals of each other.
The given equation has a slope of -3. We know this because it is in slope-intercept form y = mx + b ...y = (slope)x + (y-intercept).
so taking the slope -3...the opposite signed reciprocal would be +
Now we have a slope and a point... we can use them to find the b (y-intercept)
x = 4, y = 3, and m =
Using the common denominator fraction for 3, we subtract 4/3 from both sides
plug the values for m and b into the slope intercept form
The given equation has a slope of -3. We know this because it is in slope-intercept form y = mx + b ...y = (slope)x + (y-intercept).
so taking the slope -3...the opposite signed reciprocal would be +
Now we have a slope and a point... we can use them to find the b (y-intercept)
x = 4, y = 3, and m =
Using the common denominator fraction for 3, we subtract 4/3 from both sides
plug the values for m and b into the slope intercept form