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Salsk061 [2.6K]
3 years ago
12

6x+2y=18 solve for y

Mathematics
2 answers:
vodka [1.7K]3 years ago
6 0

I think there should be multiple answer for this one. Like if x=2, then y=3. Or if x=3, then y=0. Or if x=0, y=9.

Alchen [17]3 years ago
3 0
6x + 2y = 18
2y = -6x + 18
y = -3x + 9
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Explanation:

The question states:

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This is how you solve it.

1) Use the fundamental identity (in this part I use α instead of Θ, just for facility of wirting the symbols, but they mean the same for the case).

(cos \alpha )^2 + (sin \alpha )^2 =1

2) From which you can find:

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3) Replace sin(α) with 1/4

=> (cos \alpha )^2 = 1 - (1/4)^2 = 1 - 1/16 = 15/16

=> cos \alpha =+/- \sqrt{15/16} = +/- (\sqrt{15} )/4

4) Given that the angle is in the first quadrant, you know that cosine is positive and the final answer is:

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