in a class of 20 students, how many conversations must be had so that every student talks to every other student in the class?
A) 190
B) 380
C) 760
D) 6840

Answers

Answer 1
The answer is b - 380 students because each student (20 total) has to talk to 19 other students. 20*19= 380
Answer 2

Answer:

[tex]\text{A) }190[/tex]

Step-by-step explanation:

Similar to the handshake problem, if every student must talk with another person, each student will talk to 19 other students. However, a conversation consists of two people, so we must divide the number of ways we can rearrange the two people ([tex]2![/tex]). Therefore, our answer is [tex]\frac{20\cdot 19}{2!}=\boxed{\text{A) }190}[/tex]


Related Questions

which is equivalent to 2/9

Answers

Answer:

4/18 is equivalent to 2/9

10 Which equation matches the graph? ​

Answers

Answer: the first one

Step-by-step explanation:

Answer:

I believe the answer is A) y = 2/3x + 1

Step-by-step explanation:

The y-intercept is at 1 and the slope is up 2 over 3-- meaning A is the answer

I hope this helps :)

Estimate 121.45 ÷ 10.87

Answers

Answer:

11

Step-by-step explanation:

11 all u got do i use ur calculator

Pls help !! Will give brainliest

Answers

Answer:

the first one (25x + 30y is less than or equal to 100)

Step-by-step explanation:

money for clothing set x amount of sets plus pairs of shoes has to be less than or equal to 100 dollars.

I need Answer Immediately!!!!!!!!!

Answers

Answer:

the equation is x-6

pls mark me as brainliest

What is the slope of the line y = 6x + 3?
3
-6
6
-3

Answers

Answer:

the answer is 6

Step-by-step explanation:

slope = m

y = mx + c

m = 6

A company uses paper cups shaped like cones for its water cooler. Each cup has a height of 9cm, and the base has a radius of 4cm. How much water is needed to fill 150 cups? Use 3.14 for π, and do not round your answer.

Answers

Answer:

22608cm³

Step-by-step explanation:

Step 1

We find how many liters of water can be contained in 1 cup. We do this by finding the volume of the cup.

Cup is shaped as a cone

The volume of a cone = πr²h/3

Where

r = radius = 4cm

h = height = 9cm

π = 3.14

Hence,

Volume of the cone (cup) =

3.14 × 4² × 9/3

= 150.72 cm³

Step 1

How much water is needed to fill 150 cups?

1 cup = 150.72 cm³ of water

150 cups = x

Cross Multiply

x = 150 × 150.72 cm³

x = 22608 cm³ of water

Therefore, 22608cm³ of water is needed to fill 150 cups

Help i need to find this,

Answers

Answer:

Adjacent

Step-by-step explanation:

They are next to each other ^^

Of the flags in Albert's Flag Shop, 1/10 are pink and another 1/2 are orange. What fraction of the flags are either pink or orange?

Answers

Answer: 6/10

Step-by-step explanation: The answer is 6/10 because: first you convert the 1/2 to tenths which would be 5/10. Then, you add 1/10 and 5/10 and you get 6/10 of the flags were either pink or orange.

true or false: when multiplying radicals, you multiply the radicands together and the numbers outside the radicals together

Answers

You can only multiply numbers that are inside the radical symbols

Simplify: 25^a+3 * 5^3a

Answers

Answer:

   a

25.  + 375a

Step-by-step explanation:

Answer: 25^a + 375a

Step-by-step explanation:

SOLVE THE PROBLEM. WILL CHOOSE BRAINLIEST


S+S+8+12=38

Answers

Answer:

S=9

Step-by-step explanation:

First combine like terms

2s+20=38

then simplify

2s=18

S=9

Select all the equations that have graphs with the same y-intercept.
A:
y = 3x - 8
B:
y = 32 - 9
C:
y 3 + 8
D:
y 528
8
Any help??!

Answers

Answer:

A, D, E

Step-by-step explanation:

y=mx+b b is the y-intercept

I can see that 3 equations have -8 as a y-intercept so select those

Ex: y=3x-8

Complete the frequency table for the following set of data. You may optionally click a number to shade it out.
5
5,
2
2,
5
5,
2
2,
3
3,
5
5,
1
1,
1
1,
3
3,
1
1,
0
0,
4
4,
4
4,
6
6,
2
2,
1
1,
0
0,
5
5,
4
4,
7
7,
2
2,
3
3,
0
0

Answers

Answer:

0 -> 6 in frquency

1 -> 8 in frequency

2 -> 8 in frequency

3 -> 6 in frequency

4 -> 6 in frequency

5 -> 8 in frequency

6 -> 2 in frequency

7 -> 2 in frequency

Step-by-step explanation:

brainliest plz

Look at the data on the line plot.

Line plot shows a number line from 0.1 to 0.7 which is divided into 6 equal parts. 1 dot on 0.1, no dot on 0.2 to 0.4, 2 dots on 0.5, 4 dots on 0.6 and 1 dot on 0.7 is given.

Which data value would be considered the outlier? Enter your answer in the box.
.

Answers

Answer:

it is 0.4

Step-by-step explanation:

A square pyramid has a slant height of 15 cm. A side length of the base is 20 cm. What is the surface area of the pyramid? Enter your answer in the box. Answer in cm²​

Answers

Answer:

1000 cm2

Step-by-step explanation:

Pretty sure

Answer:

Your answer is: 1000[tex]cm^{2}[/tex]

Step-by-step explanation:

EASY MATH PLEASE HELP!
EXPLANATION REQUIRED
NO LINKS PLEASE
I WILL GIVE BRAINLIEST!

Answers

27 cubic feet , multiply 6 by 3 then multiply 18 by 1.5 and you get 27

On a very cold morning, it was -8°F. As the day went on, the temperature rose 2 degrees each hour. Which equation shows the temperature over time?

Answers

Answer:

Step-by-step explanation:

t = 2h-8  

since you didn't put in the equations,  just put in what ever variable is where t is at and any variable other than t for the h   :)

Answer:

Please put equations, so I can able to give you ans

Quadratics and Their Solutions: I NEED HELP

Answers

Answer:

-7, 1

Step-by-step explanation:

The roots of an equation are the answers to the equation, where the graph of the equation intersects the x-axis. One can see that the points at which the graph intersect the x-axis are the following,

(-7, 0) and (1, 0), therefore the roots to the equation are the following;

-7, 1

Find the volume round to the nearest hundredth

Answers

Answer:

333.67

Step-by-step explanation:

trust

supplementary angles: look at the attachment to see the question

Answers

Answer:

x = 21

Step-by-step explanation:

21 x 3 = 63 and 63 + 67 = 130 and sense there across from eachother this is correct because vertical angles are always the same measure.

Hope this helps!

Sasha has a rectangular garden 8 m by 10 m. The garden has a path surrounding it which is 2 m wide. What is the total area of the garden and pathway? A. 168 m^2 B. 120 m^2 C. 116 m^2 D. 96 m^2 E. 84 m^2

Answers

Answer:

b

Step-by-step explanation:

Area of a rectangle = length x width

length = 8 + 2 = 10

width = 10 + 2 = 12

10 x 12 = 120

121057003
Sphere
Find the area of
radius tem
Area - 300cm-
30cm ainda​

Answers

Answer:

Step-by-step explanation:

Circumference (Perimeter) of Circle Formula: The circumference of a circle is determined by the following formula

C

=

D

×

π

where

D

is the length of the diameter of the circle and

π

3.14

.

Circumference (Perimeter) of Circle Formula: The circumference of a circle is determined by the following formula

C

=

2

×

r

×

π

where

r

is the length of the radius of the circle and

π

3.14

.

Area of Circle Formula: The area of a circle is determined by the following formula

A

=

r

×

r

×

π

=

r

2

×

π

Find arc length for QT

Answers

Step-by-step explanation:

arc length for QT = 2× 71° = 142°

mean, median, mode, and range
23, 24, 24, 25, 26, 27, 28, 29, 30

Answers

Mean- 26.222222222222

Median- 26

Mode- 24

Range- 7

Hope this helped :D

PLZ HELP ME
What is the quadratic regression equation for the data set?




yˆ=−0.175x2−3.786x+121.119

​yˆ=−0.175x2+3.786x−121.119​

​yˆ=−0.175x2+3.786x+121.119​

​ ​ ​yˆ=−0.175x2−3.786x−121.119​ ​ ​
x y
6 100
3 110
10 50
3 90
5 120
15 30
9 70

Answers

Answer:yˆ=−0.175x2−3.786x+121.119

look at picture

Step-by-step explanation:

The quadratic regression equation for the data set is:

y^ = -0.175x²-3.786x+121.119

What is Quadratic Regression Equation?

Quadratic regression is the process of determining the equation of a parabola that best fits a set of data. This set of data is a given set of graph points that make up the shape of a parabola. The equation of the parabola is y = ax² + bx + c, where a can never equal zero.

According to the given problem,

Let us choose any value of x,

x = 10

For this value of x we can see that the respective value of y= 50

Substituting the value of x in the equations to see which equation satisfies the value of y as 50.

Substituting the value of x in the equation:

y^ = -0.175x²-3.786x+121.119

y^ = 50

Hence, we can conclude that y^ = 0.175x² - 3.786 + 121.119 is the quadratic regression equation for the given data set.

Learn more about Quadratic Linear Equations here:

https://brainly.com/question/24639881

#SPJ2

I need an Answer Immediately,pls!!!!!!

Answers

Answer:

See below.

Step-by-step explanation:

[tex]41.5 + 5x = 52.5\\5x = 11\\x = 2.2[/tex]

Answer:

41.5+5x=52.55x=11x=2.2

10. Solve for x akoajssbsbqn

Answers

Answer:

x = 5

Step-by-step explanation:

10 * 7 = x * 14

10 * 7 = 70

14 * x = 14x

14x = 70

divide each side by 14

14x / 14 = x

70 / 14 = 5

we're left with x = 5

Four-fifths of a math class is made up of female students. What is the
ratio of male students to female students?

Answers

I am answering this so the other answer can get brainliest since they were the ones who gave you the answer :)

HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP
HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP

Answers

9514 1404 393

Answer:

  D.  2%  

Step-by-step explanation:

The growth rate can be found by looking at the growth factor of the exponential function.

  f(x) = (initial value) × (growth factor)^x

The growth rate is related by ...

  growth factor = growth rate + 1

This means the growth rate of f(x) is 1.04 -1 = 0.04 = 4%.

__

We can write the function g(x) describing the table as ...

  g(x) = (value at x=x1) × ((value at x=x2)/(value at x=x1))^((x-x1)/(x2-x1))

So, this could be ...

  g(x) = 31.21 × (32.47/31.21)^((x-2)/2) = a·b^x

     where b = (32.47/31.21)^(1/2) ≈ 1.02 . . . . growth factor

This means the growth rate for g(x) is 1.02 -1 = 0.02 = 2%.

__

Then the difference between the growth rates of the two functions is ...

  4% - 2% = 2% . . . . . matches choice D

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