Tabitha was shooting free throws in gym class. She completed 10 of the shots, which was half of 2 more than Joan completed. What is the number of free throws, n, that Joan completed?
A.
12
B.
22
C.
8
D.
18

The answer is: y would equal 3 because if you simplify the equation then it would be y= 3x+9 and if you divide 3x and 9 by 3 it would equal 3. y= 3

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since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.