3 years ago

Which expression means 7 more than a number?

1 answer:

4 0

The answer is B

- "More" means added to, or addition. So 7 more than 'A number' is: d + 7

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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

How do I solve this?

Aleksandr-060686 [28]

First you have to set up your equation. 5x+80 and x+15.

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A football team gains 3 yards on the first play ,loses 6 yards on the second play,loses 4 yards on the third play , and gains 5

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Net yardage=3-6-4+5=-2

So the team lost 2 yards in four plays...

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What is the answer -.6x+ .9= 1x+2.4

Mariulka [41]

Answer:

X=-0.9375 or -15/16

Step-by-step explanation:

-0.6+0.9=x+2.4

-0.6x-x=2.4-0.9

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2 years ago

Look at the graph below. What is the slope of the line?

yarga [219]

Answer:

what graph

Step-by-step explanation:

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