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3 years ago

I have my geometry midterm on Friday and I don't know how to do this problem. Someone help?

Mathematics

1 answer:

sineoko [7]3 years ago

8 0

Since the lines u and v are parallel, this means that the angles (10x - 5) = (7x + 4)
and that 7x + 4 + y = 180.

You can solve the first equation for x, then substitute that value into the second equation and rearrange for y.

10x - 5 = 7x +4
3x -5 = 4
3x = 9
x = 3°

∴ 7(3) + 4 + y = 180
25 + y = 180
∴ y = 180 - 25
y = 155°

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Previous concepts

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Solution to the problem

For this case we have the following info related to the time to prepare a return

$\mu =90 , \sigma =14$

$\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})$

And the standard deviation would be:

$\sigma_{\bar X} =\frac{14}{\sqrt{49}}= 2$

And the best answer would be

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Nady [450]

Hello,
To exist x≠0

if x>0 then
x+2/x>=3==>x²+2>=3x
==>x²-3x+2>=0
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==> (x<=1 or x>=2) and x>0
==>(0<x<=1) or (x>=2)
else
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end if

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