1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kari74 [83]
3 years ago
13

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?
Mathematics
1 answer:
Murljashka [212]3 years ago
8 0

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

You might be interested in
Justin writes the letters illinois on cards and then places the cards in a hat. What are the odds in favor of picking an I.
kirill115 [55]
Probablity=desiredoutcomes/totalpossible
total possible=number of cards or number of letters which is 8 letters

desired is number is the letter "I", which is 3
3/8 is probality
in favor it is 3:5, because we are looking at odds of picking vs not picking
not is 5/8
3:5 s answer
A is answer
5 0
3 years ago
The girl to boy ratio is 3 to 7 if there are 50 students total how many boys
Naddik [55]

Answer:

15 girls, 35 boys

Step-by-step explanation:

Step 1:

3 : 7       Ratio

Step 2:

3x + 7x = 50        Substitute

Step 3:

10x = 50     Add

Step 4:

50 ÷ 10     Divide

Step 5:

x = 5

Answer:

15 girls, and 35 boys     Multiply

Hope This Helps :)

5 0
3 years ago
What is the measure of the central angle of a circle with radius 15 ft that intercepts a 10 ft arc?
olga2289 [7]
  • L=10ft
  • R=15ft
  • We have to find theta

\Large{\underline{\sf Solution:-}}

\\ \sf\dashrightarrow L=\dfrac{\Theta}{180}\times \pi r

\\ \sf\dashrightarrow 10=\dfrac{\Theta}{180}\times 3.14\times 15

\\ \sf\dashrightarrow 10=\dfrac{\Theta}{180}\times 47.1

\\ \sf\dashrightarrow \Theta=\dfrac{10(180)}{47.1}

\\ \sf\dashrightarrow \Theta=\dfrac{1800}{47.1}

\\ \sf\dashrightarrow \Theta=38.2°

5 0
2 years ago
Find the length of leg " a" if leg "b" = 12 and the hypotenuse "c" is 13
quester [9]
A^2 + b^2 = c^2

a^2 + (12)^2 = (13)^2

a^2 + 144 = 169

a^2 = 169 - 144

a^2 = 25

Sqrt (a^2) = Sqrt(25)

a = 5

Please mark brainliest if this helps
3 0
3 years ago
Angle DEB is 42. State the size of angle ABD
Kay [80]

Answer:

The answer would be 80 ° because 5×( 2 + 13 or x +1 ) is 80

Step-by-step explanation:

ABD is 80°

If DEB is 42 °

∠ ABD = 5(2X+1)

∠ DBC = 3X+6

∠ EBC = Y +135/2

∠ ABD and ∠ DBC are linear pairs

∴ ∠ ABD +∠ DBC = 180

∴ 5(2X+1) + 3X+6 =180

solve for x

∴ x = 13

∴∠ ABD = 5(2X+1) = 5(2*13+1) = 135

 ∠ DBC = 3x+6  = 3*13+6 = 45

∠ ABD  and ∠ EBC are vertical angles

∴ ∠ ABD = ∠ EBC = 135

∴ y +135/2 = 135

∴ y = 135/2

5 0
3 years ago
Other questions:
  • At a theme park, 35% of daily visitors ride the log ride. If on one particular day the park has 60,000 visitors, how many can be
    7·2 answers
  • The perpendicular bisector of the line segment connecting the points (-3,8) and (-5,4) has an equation of the form y = mx + b. F
    7·2 answers
  • Cathy did a survey in four bird parks and wrote the following observations: park p number of green birds 18 total number of bird
    15·2 answers
  • A circle with a radius of inches has a central angle of 0.25 radians that intercepts an arc of inches.
    5·2 answers
  • A college surveys local businesses about the
    15·1 answer
  • Eight less than the product of 7 and a number is 3. Use the variable w for the unknown number
    11·2 answers
  • A survey of a group’s viewing habits over the last year revealed the following
    14·1 answer
  • Candy's Sweets Company charges $1.15 per pound to ship candy.
    13·1 answer
  • Identify which graph below contains the coordinate points (–3, 4),(–2, 0), and (0, –8). Select all that apply.
    7·2 answers
  • Find the volume.<br> Area = 16.4 cm²<br> 8.1 cm<br> cm³
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!