You decide to give 18 of your card collection to your little brother. How much of your collection do you have left?
2 answers:
Answer:
The answer is
Step-by-step explanation:
In order to determine the answer, we have to build the expression that represents the remain collection.
According to the statement, we do not know the initial collection, but we can express this amount with a variable:
C=initial collection cards
Then, we know that we have to give 18 card to the little brother, so we have to subtract 18 to the initial collection.
The expression for the remain cards is:
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Idk if its right sorry
Notice the picture below
so.... the angle of depression, is above in dashed lines.... however, the angle of depression, is identical to the angle of elevation from the water, since, both angles are "alternate interior" angles
now, using the 45-45-90 rule, then we know the swimmer is 90 feet from the lighthouse, then just use the tangent ratio to get "x"
so.... the angle of depression, is above in dashed lines.... however, the angle of depression, is identical to the angle of elevation from the water, since, both angles are "alternate interior" angles
now, using the 45-45-90 rule, then we know the swimmer is 90 feet from the lighthouse, then just use the tangent ratio to get "x"
Answer:
The value of the test statistic is
Step-by-step explanation:
The null hypothesis is:
The alternate hypotesis is:
Our test statistic is:
In which X is the sample mean, is the null hypothesis value,
is the standard deviation and n is the size of the sample.
In this problem:
So
The value of the test statistic is