Answer: Option D
Step-by-step explanation:
The equation of a line in the form of "slope-interception" has the following form:
Where m is the slope of the line and b is the interception of the line with the y axis.
In this case we know that the line has a slope of -2. Then .
We also know that the line intercepts the axis y at the point (0, 3) therefore we know that:
.
Finally the equation of the line will be:
If we add 2x on both sides of the equation we get:
The answer is the option D
Answer: 18
Step-by-step explanation:
The formula to find the minimum sample size is given by :_
, where = population standard deviation.
z*= critical z-value.
E= Margin of error.
Given :
E= ± 8
We know that critical value corresponding to 99% confidence level = z*=2.576 [Using z-table]
Then, the required sample size would be :
[Round to next integer.]
Hence, the required minimum sample size = 18
Answer:
Rita is left with approximately
Step-by-step explanation:
Given:
Price for trousers=
Price for shirt =
Price for headscarf =
Total Money she Spent = Price for trousers + Price for shirt + Price for headscarf =
Total Money she had before =
∴Total Money left = Total Money she had - Total Money she spent =
Rounding to nearest whole number ≈