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3 years ago

3 = 3/2 ( 7x + 10 )

Mathematics

1 answer:

crimeas [40]3 years ago

5 0

Answer:

x = -1.142857

Step-by-step explanation:

Start by distributing the 3/2 in the parentheses.

3 = 10.5x + 15

Next, get the variables on one side. There are a few way to do this, the easiest being to subtract 15 from both sides.

-12 = 10.5x

Now you need to get the variable alone. Do this by dividing both sides by 10.5.

-1.142857 = x

Hope this helps you out.

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3 years ago

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Lena [83]

Answer:

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Step-by-step explanation:

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As both $sin\,\theta$ ,

$\theta$ lies in the third quadrant.

In the third quadrant,

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$\sin\,\theta =-\sqrt{1-\cos^2\,\theta} \\=-\sqrt{1-(\frac{-2}{5})^2 } \\\\=-\sqrt{1-\frac{4}{25} }\\\\=-\sqrt{\frac{25-4}{25} }\\\\=-\frac{\sqrt{21} }{5}$

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$\sec\,\theta =\frac{1}{\cos\,\theta }\\\\=\frac{1}{\frac{-2}{5} }\\\\=\frac{-5}{2}$

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scoundrel [369]

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3 years ago

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