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Answer:
See the proof below.
Step-by-step explanation:
For this case we need to proof the following indentity:

So we need to begin with the definition of tangent, we know that
and we can do this:
(1)
We also have the following identities:


Now we can apply those identities into equation (1) like this:
(2)
We can divide numerator and denominator from expression (2) by
we got this:

And simplifying we got:

And that complete the proof.
Y=140-5x
x will be the minutes so whatever minute you put, you multiply it by 5 the you subtract 140 with whatever you have and there’s your answer
Answer:
12*3/8 we just turn the 12 into a improper fraction and multiply the top and the bottom with 3/8 top and bottom so
12/1*3/8
12*3=36
1*8=8
so 36/8 the answer is
D
Hope This Helps!!!
Answer:
median of given data is 18