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dalvyx [7]
3 years ago
9

6x+1/2xy=3 please help im confused

Mathematics
2 answers:
taurus [48]3 years ago
6 0
6x+ (1/2x)(y)=3

Step 1: Factor out variable x.
x (y+12/2)=3

Step 2: Divide both sides by (y+12/2.

x(y+12/2)         3
------------- = ---------
   y+12          y+12
-----------      ----------
      2                2

Then your answer would be            6
                                              x=  ---------
                                                      y+12
Dafna11 [192]3 years ago
3 0
Hey there,

<span>y = 90 + -45x + -10x2 + 5x<span>3

</span></span><span>-6x + -3x = -9x y = 5(18 + -9x + 1x2 + -3x2 + x3) </span><span> (-2 + x) * (3 + x) y = 5(-2(3 + x) + x(3 + x))(-3 + x) y = 5((3 * -2 + x * -2) + x(3 + x))(-3 + x) y = 5((-6 + -2x) + x(3 + x))(-3 + x) y = 5(-6 + -2x + (3 * x + x * x))(-3 + x) y = 5(-6 + -2x + (3x + x2))(-3 + x)

</span>y = 90 + -45x + -10x2<span> + 5x</span><span>3=
</span><span>                           10        15

115+-45=70

X=70

</span>
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Which of the following is NOT a variation of a Pythagorean identity?​
Ipatiy [6.2K]

The expression that is not a variation of the Pythagorean identity is the third option.

<h3>What is the Pythagorean identity?</h3>

The Pythagorean identity can be written as:

sin^2(x) + cos^2(x) = 1

For example, if we subtract cos^2(x) on both sides we get the second option:

sin^2(x) = 1 - cos^2(x)

Which is a variation.

Now, let's divide both sides by cos^2(x).

sin^2(x)/cos^2(x) + cos^2(x)/cos^2(x) = 1/cos^2(x)\\\\tan^2(x) + 1 = sec^2(x)\\\\tan^2(x) - sec^2(x) = -1

Notice that the third expression in the options looks like this one, but the one on the right side is positive. The above expression is in did a variation of the Pythagorean identity, then the one written in the options (with the 1 instead of the -1) is incorrect, meaning that it is not a variation of the Pythagorean identity.

Concluding, the correct option is the third one.

If you want to learn more about the Pythagorean identity, you can read:

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2 years ago
If AD equals 3X +3 CD equals X +9, what is the value of X?
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ivolga24 [154]

Answer:

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cot&=b/p

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4 0
3 years ago
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