3 years ago

A parallelogram is always a rectangle if?

Mathematics

1 answer:

andrew11 [14]3 years ago

8 0

All corners are 90o angles.

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Five percent of computer parts produced by a certain supplier are defective. what is the probability that a sample of 16 parts c

velikii [3]

It is 3 in 320 chance first it's 3/16 then divide by 5%

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3 years ago

Help meeee if you want to please thank you have a good day!

Minchanka [31]

The answer is 2.7

I’m not an expert at this but i did some research so I hope I can help

It’s 2.7 because the formula for calculating density is to divide the mass by the volume and in you do that for each of them you get 2.7 every time

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If f(x)= x2 + 2 and g(x)= 2x-1, find (f ° g)(5).

valentinak56 [21]

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4 years ago

If sec theta = - √30 / 3, find cos theta.<br> if sin(-theta) = -0.97, find cos (π/2 - theta).

Cloud [144]

Step-by-step explanation:

$\cos \theta = \frac{1}{ \sec\theta } = - \frac{3}{ \sqrt{30} } = - \frac{3 \sqrt{30} }{30} = - \frac{ \sqrt{30} }{10}$

$\cos( \frac{\pi}{2} - \theta )= \cos \frac{\pi}{2} \cos \theta + \sin \frac{\pi}{2} \sin \theta$

Note that

$\sin( - \theta) = - \sin \theta$

$\cos \frac{\pi}{2} = 0 \: \: \: \: \: \sin \frac{\pi}{2} = 1$

Therefore,

$\cos( \frac{\pi}{2} - \theta ) = 0.97$

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3 years ago

The radius of a circle is 6 miles. What is the circle's area?<br> Use 3,14 for pi

ICE Princess25 [194]

Answer: 28.6 miles

Step-by-step explanation:

A = pi r^2

A = 3.14 (3)^2

Now multiply 3.14(3)^3

Your answer is 28.26

* Radius is 1/2 of the diameter.

I believe this is right, but im not sure.

Hope it helps :)

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3 years ago