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antiseptic1488 [7]
3 years ago
14

How many people were in the sample? 5 11 8 55

Mathematics
1 answer:
lorasvet [3.4K]3 years ago
4 0

Answer:

11

Step-by-step explanation:

add up all of the X symbols to get 11. Hope i helped!

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ATTENTION
finlep [7]

Here!

<h2>The answer is Option A!</h2>

(x + 2 \sqrt{3} i)(x - 2 \sqrt{3}i )

<h3>Why so??</h3>

Let's see what complex numbers are!

(x + 2  \sqrt{3 }i  )(x - 2 \sqrt{3}i ) \\  =  {x}^{2}  - 2 \sqrt{3} x + 2 \sqrt{3} x -  {(2 \sqrt{3} i)}^{2}  \\  =  {x}^{2}  -  {(2 \sqrt{3}i) }^{2}

Now we know,

{i}^{2}  =  - 1

So!

=  {x}^{2}  - 12 \times(  - 1)

=  {x}^{2}  + 12

And thus we get the answer!

3 0
3 years ago
3
Helga [31]
Answer is 3*10^2 for 300
8 0
3 years ago
Can you Please help me?
Alenkasestr [34]

Answer:

131 and 49

Step-by-step explanation:

Supplementary angle means 180° when all angles are added together.

First angle: (x + 82)

Second angle: x

(x + 82) + x = 180

2x + 82 = 180

2x = 98

x = 49

First angle: 49 + 82 = 131°

Second angle: 49°

8 0
4 years ago
Based on what you know about rotations, what do you think the mapping rule is for a rotation of 270 degrees clockwise? Explain.
Talja [164]
There are 360 degrees in one revolution.x
A 270 dedgree clockwise rotation is the same as a 90 degrees counterclockwise rotation
(x,y) maps to (-y,x)
4 0
3 years ago
Read 2 more answers
A ten-foot-long board is cut into three pieces. The second piece is half as long as the first. The third piece is 4 feet longer
VladimirAG [237]
Let's say the second piece is x ft long
The first piece is 2x ft long
The third piece is x+4 ft long
All of the pieces should add up to 10ft
x+2x+x+4=10
4x= 6
x=1.5ft
The first piece is 2x ft long=3 ft long
7 0
3 years ago
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