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anyanavicka [17]
2 years ago
5

If y=2 when x=3. What is the value of y when x=9?

Mathematics
2 answers:
elena55 [62]2 years ago
8 0
Because x was *3 you had to y*3 which is 
y=6

VikaD [51]2 years ago
3 0
Y = 2
x = 3

If x = 9, = x * 3

Thus, y * 3 = 6.

Thus, y = 6.
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3^2=2^2+2^2-2\cdot 2\cdot 2\cdot \cos \alpha,\\ \\9=4+4-8\cos \alpha,\\ \\-8\cos \alpha=9-4-4=1,\\ \\\cos \alpha=-\dfrac{1}{8},\\ \\\alpha\approx 97.18^{\circ}.

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