3 years ago

X=2y - 15 y= -2x x=2(-2x) - 15 what’s x?

Mathematics

2 answers:

kari74 [83]3 years ago

7 0

Answer:

X= -3

Y= 6

Step-by-step explanation:

That's the answer

Mnenie [13.5K]3 years ago

7 0

Answer:7100.4755

Step-by-step explanation:

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lana [24]

Answer:

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Step-by-step explanation:

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3 years ago

X over 7+4 is greater than or equal to 16

Blizzard [7]

X/11>=16

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Gekata [30.6K]

Answer:

Step-by-step explanation:

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3 years ago

given that sin theta= 1/4, 0 is less than theta but less than pi/2, what is the exact value of cos theta

lapo4ka [179]

Answer:

$\cos{\theta} = \frac{\sqrt{15}}{4}$

Step-by-step explanation:

For any angle $\theta$ , we have that:

$(\sin{\theta})^{2} + (\cos{\theta})^{2} = 1$

Quadrant:

$0 \leq \theta \leq \frac{\pi}{2}$ means that $\theta$ is in the first quadrant. This means that both the sine and the cosine have positive values.

Find the cosine:

$(\sin{\theta})^{2} + (\cos{\theta})^{2} = 1$

$(\frac{1}{4})^{2} + (\cos{\theta})^{2} = 1$

$\frac{1}{16} + (\cos{\theta})^{2} = 1$

$(\cos{\theta})^{2} = 1 - \frac{1}{16}$

$(\cos{\theta})^{2} = \frac{16-1}{16}$

$(\cos{\theta})^{2} = \frac{15}{16}$

$\cos{\theta} = \pm \sqrt{\frac{15}{16}}$

Since the angle is in the first quadrant, the cosine is positive.

$\cos{\theta} = \frac{\sqrt{15}}{4}$

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3 years ago

Find $5,875 ÷ $6,030 rounded to the nearest tenth of a percent.

saw5 [17]

1.0% exactly 0.9743. I hope I helped!

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3 years ago