there are 20 students in chess club. two students are to be selected for representing the club in a school meeting. in how many ways can a pair of students be selected from the chess club?

Answers

Answer 1

first way is play a match between all of them and select first Palace and second to be selected in the meeting


Related Questions

y+8=x/2 linear or nonlinear

Answers

answer : linear
source: trust me bro

answer : linear

source: trust me people

11=p-7-3p
Please help me

Answers

Answer:

p=-9

Step-by-step explanation:

11= p-7-3p

you can slove p-3p now which is -2p, then add -7 to both sides.

18=-2p

then divide by -2

p=-9

Infrared, ultraviolet and visible light are
all part of the electromagnetic spectrum.
The basic difference between them is
their
source
speed
wavelength
Temperture

Answers

wavelength is the right answer
wave length is the answer of this problem

PLEASE HELP!! 20 POINTS!
- ✓ 81+ ✓–49 + ✓ 25+ ✓-1

Answers

Answer:

Step-by-step explanation:

=-9+7i+5+i

=-4+8i

Answer:

It's indeterminate; because a negative number can't have an rational root when goes under an even radical.

Pedro read
1/4
of a book in the morning, and he read some more at night. By the end of the day, he still had
1/3
of the book left to read. How much of the book did Pedro read at night? write you answer as a mixed number!! Your help means the world to me. ill mark brainly! 16 points!

Answers

9514 1404 393

Answer:

  5/12

Step-by-step explanation:

Since Pedro had 1/3 of the book remaining at the end of the day, he had read a total of 2/3 of the book. If n represents the amount read at night, you have ...

  1/4 + n = 2/3

  3 +12n = 8 . . . . . multiply by 12

  12n = 5 . . . . . . . .subtract 3

  n = 5/12 . . . . . .  divide by 12

Pedro read 5/12 of the book at night.

_____

Since Pedro reads only a fraction of the book, it is not a "mixed number."

__

The solution is equivalent to finding the difference ...

  2/3 - 1/4

  = 8/12 - 3/12 = 5/12

PLZ HELP MEEEEEEEEEEEEEEEEEE

Answers

3.6 fl oz hope this helps!!!

Mikayla caught a value pack of crackers for $6.72. The value pack had 24 individually wrapped crackers packages. Solve 24x = $6.72 to find the cost per package in dollars.

Answers

Answer:

0.28$

Step-by-step explanation:

divide

The population of a city decreases by 1.6% per year. If this year's population is 320,000, what will next year's population be, to the nearest individual?​

Answers

Answer:

314,880

Step-by-step explanation:

If the population decreases by 1.6% per year, this means the population is 98.4% of the population of the previous year. What this means is we can multiply the current population, 320,000, by 98.4/100, as 98.4/100 is equivalent to 98.4%. This gets us 314,880.

Answer:

314880

Step-by-step explanation:

The triangle shown below are similar. Solve for x. 

Answers

Answer:

x=16

Step-by-step explanation:

27/45=(2x+7)/(4x+1)

cross multiply

27(4x+1)=45(2x+7)

108x+27=90x+315

108x-90x=315-27

18x=288

x=288/18

x=16

Looking at the image, The triangle shown below are similar. The value for  x is 16.

What is the triangle about?

Note that in the triangle given, the shapes are similar. Therefore:

27/45 = 2x + 7/  4x + 1

3/5 = 2x + 7/  4x + 1

So:

3 (4x + 1) = 5 (2x + 7)

12x + 3 = 10x + 35

12x - 10x = 35-3

2x = 32

x = 32/ 2

x = 16

Therefore, the value of x is 16.

Learn more about triangle from

https://brainly.com/question/17335144

#SPJ6

Solve for x, please!

Answers

Answer:

45

Step-by-step explanation:

Answer:

30 + 70 + 2x-10=180

90+2x=180

2x=180-90

x=90/2

x=45

X=45

Hope it helps

Sebutkan nama sisi rusuk dan sudut dari bangun ruang di bawah ini​

Answers

Answer:

could u translate it to english?

Step-by-step explanation:

What is the measure of arc AC? Pls explain and I will mark brainliest!

Answers

Answer:

D. 146°

Step-by-step explanation:

Arcs in the circle sum to 360°

Arc AB = 2*∠C = 2*(48°) = 96°Arc BC = 138° - givenArc AC = 360° - (96° + 118°) = 146°

Joel Bradley purchased a new cooler for his florist shop for $4,500. He wants to finance it with an installment loan from his bank. If he wants to finance only $2,800, what percent of the total cost should his down payment be?

Answers

Answer:

62.22% I think.

Step-by-step explanation:

Have a good day.

What is the measurement of angle A, side b, and side a

Answers

Answer:

a=26.039, b=58.021, c=42, A=24 degrees, B=115 degrees, C=41 degrees

Step-by-step explanation:

trig

Answer:

Step-by-step explanation:

Explain how you can use slope-intercept form to write an equation of a line given its slope and y-intercept
Substitute the slope for
and the y-intercept for
in the slope-intercept form

Answers

Answer:

Step-by-step explanation:

example

we are given: slope = 5, y-intercept = 9

y=mx+b

we just plug it in

y=5x+9

Tony graphed the line y = 52x + 2 on the coordinate plane. Which line did Tony graph?

Answers

Answer:

Slope:  

52

y-intercept:  

(

0

,

2

)

x

y

1

26

0

0

2

Step-by-step explanation:

sorry my thing is acting weird but try to solve it out ??

the answer is .............

Evaluate (4-^2)^2. Help me now now

Answers

Answer:

aksksjjsjsjjsjsjejjssnehjejeejejkejjs

Four to the power of -2 is going to be 1/16. If you multiple that by itself you get 1/256

26
24
10
HELP PLSSsSs

Answers

Answer:

what is the question? all I see is a drawing w labels

Are you asking what is the area of the shaded region?

Area semicircle = 1/2 * pi * r^2
= 1/2 * 3.14 * 13^2
= 1.57 * 169
= 265.33

Area of triangle = 1/2 * base * height
= 1/2 * 24 * 10
= 12 * 10
= 120

265.33 + 120 = 385.33

Lines De and AB are parallel.
D
C
E
B
А
Which angles represent alternate interior angles?
angles A and C
angles B and D
angles C, D, and E
angles B and C

Answers

Answer:

option 2

angles B and D are the alternate interior angles

lines DE and AB being parallel lines and and line BC being the transversal

Answer:

The answer is B and D

Step-by-step explanation:

Confirmed

What is the range of the data set? {43.2, 46.8, 44.5, 46.8, 44.2, 41.9, 45.8, 46.9, 41.2, 46.8, 44.1}

Answers

Answer:

the range of this answer is 5.6

What is the slope of the line l ? (-2,9) (6,1)

Answers

answer: -11/5
explanation: -2-9/6-1 =-11/5

In the figure shown below, line “m” and line “n” are parallel what is the value of x?

Answers

Answer:

x = 20°

Step-by-step explanation:

3x - 10° + 5x + 30° = 180° { being co-interior angles }

8x + 20 ° = 180°

8x = 180° - 20°

8x = 160°

x = 160° / 8

x = 20°

Identify the term that completes the equation.

XZ2=(WZ)(?)

Answers:
WZ
XW
XZ
YZ

Answers

Answer:

1: b. YZ, see "geometric mean theorem" in Wikipedia

2: a. sin Y = 7.4/10.9 ≈ 0.68,  sine = opposite/hypotenuse

3: c. tan P = 8.5/16 ≈ 0.53, tangent=opposite/adjacent

4: a. AC = 11.7, sine = opposite/hypotenuse, sin(43) = 8/AC

5. KM = 10.68 use Pythagorean Theorem

measure of angle M = 35 degrees, use definition of tangent

measure of angle K = 55 degrees,  M and K are complementary angle

Step-by-step explanation:

i hope this help

The term that completes the equation is YZ.

Option D is the correct answer.

We have,

From the figure,

∆WXY and ∆XYZ

∠WXY = ∠XZY = 90

∠ZYX = ∠XYW (common angle)

∆WXY ≅ ∆XYZ

And,

∆WXY and ∆WXZ

∠WXY = ∠WZX = 90

∠YWX = ∠XWZ (common angle)

∆WXY ≅ ∆WXZ

Now,

From (1) and (2),

∆XYZ ≅ ∆WXZ

This means,

The corresponding sides are proportional.

We can write as,

YZ/XZ = XZ/ZW

XZ² = WZ x YZ

Thus,

The term that completes the equation is YZ.

Learn more about triangle congruency here:

https://brainly.com/question/12413243

#SPJ2

i need help now pleaseeee

Answers

Answer:

y=75° (opposite angle of parallelogramare equal)

x+8=16(opposite sides are equal)

x=16-8

x=8

Answer:

y=75

x=8

Step-by-step explanation:

Hope this helped!

Y=x(4)/2+3x(3)-2x-12

Answers

Answer:

[tex]\displaystyle y' = -2x^3 + 9x^2 - 2[/tex]

General Formulas and Concepts:    

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Algebra I

Terms/Coefficients

Calculus  

Derivatives    

Derivative Notation    

Derivative of a constant is 0    

Basic Power Rule:    

f(x) = cxⁿ f’(x) = c·nxⁿ⁻¹

Step-by-step explanation:

Step 1: Define

[tex]\displaystyle y = -\frac{x^4}{2} + 3x^3 - 2x - 12[/tex]

Step 2: Differentiate

Basic Power Rule:                                                                                           [tex]\displaystyle y' = -\frac{4x^{4 - 1}}{2} + 3 \cdot 3x^{3 - 1} - 1 \cdot 2x^{1 - 1}[/tex]Simplify Exponents:                                                                                        [tex]\displaystyle y' = -\frac{4x^3}{2} + 3 \cdot 3x^2 - 1 \cdot 2[/tex]Divide:                                                                                                             [tex]\displaystyle y' = -2x^3 + 3 \cdot 3x^2 - 1 \cdot 2[/tex]Multiply:                                                                                                           [tex]\displaystyle y' = -2x^3 + 9x^2 - 2[/tex]

The movie club is having a new member sale, so Mindy signs up. The equation -0.4x + 0.05y - 1.25 = 0 relates y, the total cost, and x, the number of months. What is the y-intercept of the line represented by the equation?

Answers

Answer:

Y intercept : ( 0 , 25 )

Step-by-step explanation:

Answer:

         (0, 25)

Step-by-step explanation:

We need to convert function to slope-intrcept form y=mx+b, where:

-0.4x + 0.05y - 1.25 = 0         {multiply both sides by 20}

-8x + y - 25 = 0                    {add (8x+25) to both sides}

y = 8x + 25     ⇒   b = 25

Therefore y-intercept of the line is (0, 25)

HELP!!!! IT'S DUE TONIGHT!!!!!!!!!!!!

Answers

Pretty sure it’s B
Down 8 units means you’re going down the y axis which I’m pretty sure means the -8 is supposed to be on the outside

To become a member of an ice-skating rink, you have to pay a one-time $50 membership fee. The cost of admission to the rink is $6 per visit for members $10 per visit for nonmembers. After how many visits to the rink is it less expensive to be a member than a nonmember?

Answers

Answer:

10x=50+6x more than 10

Step-by-step explanation:

Sara buys a sweater at a department store. The sweater costs $3030. The store is having a 2525% off sale on everything in the store.

​Enter the amount of money, in dollars, Sara saves from the sale. Do not consider the sales tax.

Answers

Answer:

25% of 3030 is 757.5, so basically she is saving 757.5 dollars

Three houses are sold for:
£187000, £253000 and £141000
The company earns 2% commission on
each house.
What is the total commission earned?

Answers

Answer:

11,620$

p-by-step explanation:

Other Questions
Original price: $50; Markdown: 30%Find the retail price Who were the opposing parties that participated in the Missouri Compromise of 1820A) slave owners against non-slave ownersB) slaves against non-slavesC) senators against the publicD) men against women St. Valentine's Day is based on traditions from which two backgrounds? Use the drop-down menus to complete the statementsabout the map.The map showsThe Soviet zone is indicated on the map byThe Allied zones are indicated on the map by What is the definition of immigrant? aa person who moves to another country ba person who stays in their first home ca refugee da politician pleasee i neeeed help someone help me i need it ASAP!!!!!!!!!!!!!!!!!!!!!!! From The winter hibiscus ILL GIVE BRAINLY POINTS FOR THIS PLEASE HELP AND HURRY TO THANK YOUU According to the article titled French Revolution, what short-term political change resulted from the French Revolution?A.the formation of a democracyB.the formation of a republicC.the formation of a dictatorshipD.the formation of a constitutional monarchyPlease select the best answer from the choices providedABCD Jenny is saving for a vacation to the beach. How much interest will she earn ifshe invests $600 at 4.25% simple interest for 10 years? Plz help me I am timed plz plus I am bad at math Solid A is dilated using a scale factor of 2/5, resulting in Solid B. Solid B is also dilated using a scale factor of 2/5, resulting in Solid C. If the volume of Solid B is 72 3, what is the volume of Solid A and Solid C? Answer: Can yall help me please!! Which religion does NOT describe a version of the Adam & Eve story in its Holy book?Hinduism. Islamic Judaism Christianity Read the question to yourself and select the best answer. Which implementation of monetary tool by the Federal Reserve System would lead the nation's money supply to expand? A. closing failing banks and financial institutions B. decreasing the reserve requirements C. reducing the number of loans approved by financial institutions D. decreasing the purchase of government bonds and securities Aki scores twice as many points as Tyani. Tyani scores four points fewer than Nekeisha. Nekeisha scores three times as many points asMariana.If Mariana scores 5 points, how many points did Akiscore? Who should we do in our next face off friday?? CORRECT ANSWER ONLY THANK YOU helpp i forgot how to do this Help pls Which of the following is a MOTIVATOR for choice in Economics?O A. IncentivesB. WealthC. RegretD. Peer-pressure