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3 years ago

{red,blue,yellow} find all of the subsets

Mathematics

1 answer:

Masja [62]3 years ago

3 0

Answer:

An empty subset would still be a subset

{}

Then let's pick one at a time

{red}

{blue}

{yellow}

Then in pairs

{red, blue}

{red, yellow}

{blue, yellow}

and finally, everything goes in!

{red, blue, yellow}

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PLEASE HELP!!

erik [133]

$2.=c.\\\\2\sin4x\cos4x=2\sin(2\cdot4x)=2\sin8x\\\\Used:\\\sin2\alpha=2\sin\alpha\cos\alpha$

$1.=b.\\\\\csc x-\sin x=\dfrac{1}{\sin x}-\dfrac{\sin^2x}{\sin x}=\dfrac{1-\sin^2x}{\sin x}=\dfrac{\cos^2x}{\sin x}\\\\=\dfrac{\cos x\cos x}{\sin x}=\cos x\cdot\dfrac{\cos x}{\sin x}=\cos x\cot x\\\\Used:\\\csc x=\dfrac{1}{\sin x}\\\\\sin^2x+\cos^2x=1\to\cos^2x=1-\sin^2x\\\\\cot x=\dfrac{\cos x}{\sin x}$

$3.=a.\\\\\dfrac{\sin x-1}{\sin x+1}=\dfrac{\sin x-1}{\sin x+1}\cdot\dfrac{\sin x+1}{\sin x+1}=\dfrac{\sin^2x-1^2}{(\sin x+1)^2}=\dfrac{\sin^2x-1}{(\sin x+1)^2}\\\\=\dfrac{-(1-\sin^2x)}{(\sin x+1)^2}=\dfrac{-\cos^2x}{(\sin x+1)^2}\\\\Used:\\(a-b)(a+b)=a^2-b^2\\\\\sin^2x+\cos^2x=1\to \cos^2x=1-\sin^2x$

8 0

3 years ago

Look at the graph shown below:

lina2011 [118]

Answer:

Well in order to find the equation you are looking for you first must find the slope of the line. Since it gives you two points at (-4, 1) and at (0, 4), use these points to find the slope.

y = (3/4)x + 4 is the answer

Step-by-step explanation:

Tell me if it is wrong

I would appreciate a brainliest

Have a great day! :3

5 0

3 years ago

Read 2 more answers

You sell lemonade for $2 per cup and orange juice got $3 per cup. You sell a total of 100 cups for $240. How cups of lemonade an

Andrei [34K]

Answer:

240

Step-by-step explanation:

lets see

if we sell 100 cups of lemonade that would make 200 dollars NOT ENOUGH

if we sell 100 cups of orange juice that would make 300 TOO MUCH

meaning we have the find the right one

lets say if we sell 80 lemonade cups we would make 160 then have 20 orange juice which would make 60 and 160+60= 220 so not enough either

this means we can't have as much lemonade

lets try 75 cups of lemonade

lets say if we sell 50 lemonade cups we would make 100 then have 50 orange juice which would make 150 and 150+100= 250 so too much

lets try 55 cups of lemonade

lets say if we sell 55 lemonade cups we would make 110 then have 45 orange juice which would make 135 and 110+135= 145

sooo close

try 60

60*2-120 40*3-120

120*120= 240

7 0

4 years ago

Read 2 more answers

Find the area under the standard normal distribution curve between z=0 amd z=1.38

Varvara68 [4.7K]

Answer:

$P(0$

And using the normal standard distribution table or excel we got:

$P(0$

The excel code would be:

"=NORM.DIST(1.38,0,1,TRUE) -=NORM.DIST(0,0,1,TRUE)"

Step-by-step explanation:

For this case we know that our random variable of interest is Z and the distribution is given by:

$Z \sim N(\mu =0 , \sigma =1)$

This distribution is an special case of the normal distribution.

And we want to find this probability:

$P(0$

And we can find this probability with this difference and using the concept of cumulative distribution function for a continuous distribution:

$P(0$

And using the normal standard distribution table or excel we got:

$P(0$

The excel code would be:

"=NORM.DIST(1.38,0,1,TRUE) -=NORM.DIST(0,0,1,TRUE)"

7 0

4 years ago

The average of 1/2006 and 1/2007 is equal to half of their?

erma4kov [3.2K]

Add it. average= sum of 2 counts/2

5 0

3 years ago