Answer:
2---> 1/2
1/5 ----> 5
-4 ----> 1/-4
1 2/5 = 7/5 ----> 1/(7/5) = 5/7
Step-by-step explanation:
Hey!
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Steps To Solve:
17 - 2v = -53
~Subtract 17 to both sides
17 - 2v - 17 = -53 - 17
~Simplify
-2v = -70
~Divide 2 to both sides
-2v/-2 = -70/-2
~Simplify
v = 35
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Hence, the answer is 
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Hope This Helped! Good Luck!
This time it's cosine.
Cosine is the adjacent/hypotenuse. In this case, the adjacent is 15 and hypotenuse is 21.
15/21, or like 5/7.
Now put that into a fancy calculator with the

thing or something like that and then you have the answer, or around 44 degrees.