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andrew-mc [135]
3 years ago
7

PLEASE HELP! 8 POINTS!! Find the value

Mathematics
1 answer:
Pepsi [2]3 years ago
5 0

Answer:

-sqrt(3)/2

Step-by-step explanation:

Use double angle identity for sin(2x)

sin(2x)=2sin(x)cos(x)

We are given sin(x)=-1/2 so we already have so far that:

sin(2x)=2(-1/2)cos(x)

sin(2x)=-1*cos(x)

We just need to find cos(x).  

x is in the fourth quadrant so cosine will be positive there

knowing the unit circle we should know that if sin(x)=-1/2 then cos(x)=sqrt(3)/2 while in 4th quadrant.

So the answer is sin(2x)=-1*sqrt(3)/2=-sqrt(3)/2

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What is the median of 10,11,12,12,15,17,18,21,22,25,25,25,29,30,30,31,32​
zhannawk [14.2K]

Answer:

Your answer is 22.

Step-by-step explanation:

This is how to find the median for future reference:

first, the data should be arranged in order from least to greatest. If there is an even number of items in the data set, then the median is found by taking the mean (average) of the two middlemost numbers.

8 0
3 years ago
Andy is designing a dice tray in the shape of a rectangular prism to use during a role-playing game. The tray needs to be three
Dmitry_Shevchenko [17]

Answer:

3x^2 + 15x - 252 = 0

Step-by-step explanation:

The volume of the prism is 252 cubic centimeters.

The volume of a rectangular prism is gotten by the formula:

V = l * w * h

where l = length

w = width

h = height

The height of the prism is 3 cm.

Let x be the width of the prism.

The length of the prism is 5 cm longer than the width.That is:

l = 5 + x

The volume of the prism is therefore:

V = (5 + x) * x * 3

=> 252 = (5x + x^2) * 3\\\\252 = 15x + 3x^2\\\\=> 3x^2 + 15x - 252 = 0

This is the equation that models the volume of the tray in terms of x.

6 0
3 years ago
Sydney reads 50 pages in 40 minutes how many pages does she read per minute
kirill115 [55]

1.25 pages per minute.

3 0
3 years ago
Read 2 more answers
PLEASE HELP MEEEEEEEEEEEEEEEEE​
brilliants [131]

Answer:

A. .25

B. .95

C. .75

D. .42

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
A student writes the equation for a line that has a slope
levacccp [35]
Y = mx + c
Where
y is the y of (2, -8)
x is the x of (2, -8)
m is the gradient or slope
c is the y intercept (you don’t know what it is)

Put into equation and find c

Once find c rewrite the equation with only the m and c in numbers

Eg

y = 5x + 3 (this is an example not the answer)

Hope this is helpful if you don’t understand please comment
7 0
2 years ago
Read 2 more answers
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