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amid [387]
3 years ago
15

What is (9x^4-x^2y^2-5y^4)-(3x^4+2x^2y^2-7y^4)

Mathematics
1 answer:
g100num [7]3 years ago
8 0
(9x⁴ - x²y² - 5y⁴<span>) - (3x</span>⁴ + 2x²y² - 7y⁴<span>)
</span>9x⁴ - x²y² - 5y⁴ - 3x⁴ - 2x²y² + 7y⁴
6x⁴ - 3x²y² + 2y⁴
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ivolga24 [154]

Answer:

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Step-by-step explanation:

its to blurry what does it say so i can help

5 0
3 years ago
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satela [25.4K]

Answer:

x = 2/3, -2/3

Step-by-step explanation:

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7 0
3 years ago
Help me, its trigonometry college
prohojiy [21]

4) (a) For these problems, you should take time to familiarize yourself with common fractions that appear on the unit circle.  \frac{\sqrt{3}} {3} does not appear in the unit circle unless you take the quotient 1/2 divided by sqrt(3)/2 which gives you 1/sqrt(3) which is the same as sqrt(3)/3.  So our numerator is 1/2 and our denominator is sqrt(3)/2.

And remember tangent is just sin/cos.  So what degree has sinx as 1/2 and and cosx as sqrt(3)/2?  Well, 30 degrees does, but 30 degrees is not within the range we are given.  That means they are looking for a sinx that gives us -1/2 and a cosx that gives us -sqrt(3)/2 and that is 210 degrees.

And 210 degrees in radians is 7pi/6.

I hoped that made sense.

(b) This is a lot easier. What angle gives us a cos x of -sqrt(3)/2?  According to the unit circle, 150 degrees and 210 degrees does.  They usually want these in radians, so the answer is 5pi/6 and 7pi/6, respectively.

5) What quadrant is radian measure 5 in?

Well 2pi or roughly 6.28 is a full circle. And 5 is slightly less than 6.28, so it is probably in quadrant IV.

But to be sure let's change 5 radian to degrees:

5 * 180/pi = 900/pi = 286.48 degrees

286.48 degrees is definitely in Q4, so we are correct.




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3 years ago
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ivann1987 [24]

Answer: Number 1 is 40 dollars

Step-by-step explanation:

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harina [27]

The square root of 49 is the number, which multiplied by itself, is 49. In other words, the square of this number equals forty-nine. If you have been looking for square root of forty-nine, then you are right here, too. On this page you can also find what the parts of √49 are called, and in addition to the terminology of √49, we also have a calculator you don’t want to miss. Read on to learn everything about the sqrt 49.

this should help u answer it

6 0
3 years ago
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