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tino4ka555 [31]
3 years ago
7

Find the solution for y=2x-1 y=3x+2

Mathematics
1 answer:
ziro4ka [17]3 years ago
6 0
ANSWER: (-3,-7)
Set them equal to each other so, 2x-1=3x+2 to find x. You should get x= -3


Then you plug in -3 for x to find Y for either y=2x-1 or y=3x+2. I’m picking y=3x+2 so when you plug in -3 to x it will be y=3(-3)+2 = -7 . So therefore y=-7




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Show

\dfrac{\sin ^2 x + \sin x \cos x}{\cos x - 2 \cos^3 x} = \dfrac{\tan x}{\sin x - \cos x}

I don't like this computer aided instruction holding my hand.  I'll ignore that at first so I can compare my solution to the one being taught.

We can see how a tan factors out; let's see what's left.

\dfrac{\sin ^2 x + \sin x \cos x}{\cos x - 2 \cos^3 x}

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We need to factor out a sin x + cos x in the denominator so let's change one of the squared cosines to squared sine.

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=\dfrac{\tan x}{\sin x - \cos x} \quad\checkmark

OK, now I can look at what they did.

First step ok, the box is 2 cos^2 x

Second step they changed the 1, box same as before: 2 cos^2 x

Third box matches our proof,  cos^2 x

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Answer:

the first one

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because 1 inch=22feet, so 242 feet=11 inch

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