Estimate the solution to the system of equations. You can use the interactive graph below to find the solution.
3.x + 3y = 9
2x - 7y = -14
Choose 1
2
3
А
x= -1
y =
B
2
3
x = -1, y = 1-
5
2
3
5
2
3
D
2=
2
Y = 1
5
у

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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.