2 years ago

What is the value of x to the nearest tenth?

Mathematics

1 answer:

Ipatiy [6.2K]2 years ago

4 0

Answer:

Step-by-step explanation:

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Feliz [49]

Answer:

Step-by-step explanation:

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1 year ago

What is the value of y in the solution to the system of equations 5x-y=25 and x+4y=-10

Amiraneli [1.4K]

Answer:

y=-3.571

Step-by-step explanation:

To get rid of the x's make the other x cancel out the other.

5x-y=25+(-5(x+4y=-10)=-21y=75= -3.571

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2 years ago

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There are 560 students at Smith Middle School, 45% of them are in athletics. How many students are in athletics?

zzz [600]

Answer:

252

Step-by-step explanation:

560x0.45 is 252

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2 years ago

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WILL MAKE BRAINLIEST!!!<br><br> what is the slope of each line?

Scorpion4ik [409]

The correct answer is d, 2

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2 years ago

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Which expression is equivalent to the following?

xeze [42]

Step-by-step explanation:

$\sin^{4}x \: - \cos^{4} x = (\sin^{2}x)^{2} - (\cos^{2}x)^{2}$

$= (\sin^{2}x)^{2} - (1 - \sin^{2}x)^{2}$

$= \sin^{4}x - (1 - 2\sin^{2}x + \sin^{4}x)$

$= 2\sin^{2}x - 1$

$= - \cos2x$

Note: I used the identity

${ \sin }^{2} x = \frac{1}{2} (1 - \cos \: 2x)$

for the last step.

PS. I love proving trigonometric identities!

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2 years ago