On the first math test, Keiko answered 19 out of 20 correct. On which test did she get a better grade? Write a ratio in faction
2 answers:
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Answer:
Step-by-step explanation:
The margin of error is computed using the formula:
The critical of <em>z</em> for 95% confidence level and 90% confidence level are:
*Use a <em>z</em>-table.
The sample size is n = 44.
Compare the MOE for 95% confidence level and 90% confidence level as follows:
Answer:
The measure of one angle is , and the measure of the other one is
Step-by-step explanation:
Recall that supplementary angles are those whose addition renders
We need to find the measure of two such angles whose difference is precisely .
Let's call such angles x and y, and consider that angle x is larger than angle y, so we can setup the following system of equations:
We can now solve this by simply combining term by term both equations, thus cancelling the term in "y", and solving first for "x":
So, now we have the answer for one of the angles (x), and can use either equation from the system to find the measure of angle "y":