Mrs. Smith's class is working on a variety of science experiments. Each
student must complete one experiment with each of the other students in
the class. There are 12 students in the class. How many different groups
will be made by the end of the experiments ? Each pair of students can
only be together once.
Answers
Answer:
66
Step-by-step explanation:
If there are n students, then the number of pairs is [tex]\frac{n(n-1)}{2}[/tex].
With 12 students, [tex]\frac{12(12-1)}{2} = \frac{132}{2}=66[/tex] pairs can be formed.
The reason the formula works is this: Each of the 12 students can be paired with 11 other students (no student is paired with him/her self). But counting 12 x 11 = 132 counts each pair twice. Example: student A can be paired with student B,..., student B can be paired with student A. The pair was counted two times.
See the attached image that shows pairings of 5 students. There are
5(5 - 1)/2 = 5(4)/2 = 10 pairs.
Related Questions
Determine whether the equation is linear or not. Then graph the equation by finding and plotting ordered-pair
solutions.
y = 8x
.
Is the equation y = 8x linear or not?
not linear
linear
(Answer quickly)
Answers
Answer:
i dont know i just want points
Step-by-step explanation:
Answer:
no its not linear
Step-by-step explanation:
here is one example of a linear equation: y = 5x + 12
help please pick an answer from the ones provided
Answers
Answer:
c is the correct answer..........
Answer:
c
Step-by-step explanation:
a) What is 85% of 350?
b) What is 22% of 600?
Answers
Answer:
a)297.5
b)132
Step-by-step explanation:
85% of 350 = 0.85 * 350 = 297.5
22% of 600 = 0.22 * 600 = 132
If my answer is incorrect, pls correct me!
If you like my answer and explanation, mark me as brainliest!
-Chetan K
Answer:
a. 297.5
b.132
Step-by-step explanation:
basically you multiply the numbers then move the decimal twice to the left.
Example: 85x350 = 29750
=297.5
Solve for x 4(x + 2) = 3 (x - 2)
Answers
Answer:
x = -14
)Step-by-step explanation:
To find the value of x
Transpose
4(x + 2) = 3 (x - 2)
4x + 8 = 3x - 6
4x - 3x = -6 -8
x = -14
we can even cross check
putting the value of x by -14
4(x + 2) = 3 (x - 2)
4 (-14 +2) = 3 (-14 -2)
-56 +8 = -42 -6
-48 = -48
same = same
so CROSS-CHECKED
Answer:
x = -14
Step-by-step explanation:
4(x + 2) = 3 (x - 2)
4x + 8 = 3x - 6
x + 8 = -6
x = -14
The beginning mean bi-weekly wage in a certain industry is $1,891.00. If the mean bi-weekly wage grows by 5.75%, what is the new mean annual wage?
a
$42,056.00
b
$45,461.32
c
$49,166.00
d
$51,993.05
Answers
Answer:
51,993.05
Step-by-step explanation
Just took the test and got it right
Find the sum.
12Σn=1 3n +1
a. 252
b. 234
c. 246
Answers
Answer: C
Step-by-step explanation:
[tex]Method\ 1\\\\\displaystyle \sum _{i=1}^{12} (3i+1)=\dfrac{((3*12+1)+(3*1+1))*12}{2} =(37+4)*6=246\\\\Methode\ 2\\\\\displaystyle \sum _{i=1}^{12} (3i+1)=\sum _{i=1}^{12} (1)+3*\sum _{i=1}^{12} (i)=12+3*\dfrac{(12+1)*12}{2} =12+3*13*6=246\\[/tex]
Answer C
what integer best represents that the temperature outside increased by 12°F?
I WILL APPRECIATE
Answers
Answer:
-11.11*C
Step-by-step explanation:
12°F − 32) × 5/9 = -11.11*C
How do you get 6.80 from 2.25 ×2.80
Answers
Answer:
answer is 6.3
Step-by-step explanation:
there is no way to get 6.80 from 2.25*2.80 because its answer is 6.3
Explain?????????????????
Answers
16+15+16
Answer is 47
Which is a list of irrational numbers from least to greatest?
1
V2
1
va'
O V5,
V5,
O V5, 11, 12
ot; ž, v5
Answers
the endpoints of GH are G(-1,6) and H(1,-2) Find the coordinates of the midpoint M *please explain*
Answers
Answer:
( 0, 4 )
Step-by-step explanation:
midpoint formula: (x1 + x2/ 2, y1 + y2/ 2)
x1= -1
x2= 1
y1= 6
y2= -2
(-1 +1/ 2, 6 -2/ 2) -> (0,4)
What is Q1 for this data set?
{2, 3, 5, 5, 6, 8, 8, 9, 10, 11, 11, 11, 12}
Answers
Answer:
Q1 = 5
Step-by-step explanation:
Q1 is the first quartile
Divide the data in half, that will get you Q2 or the second quartile
There are 13 data points so the middle is the 7th data point
2, 3, 5, 5, 6, 8, 8, 9, 10, 11, 11, 11, 12
Take the lower half of the data and divide it in half
There are 6 data points so the middle is between the 3rd and the 4th data point so we average them
2, 3, 5, 5, 6, 8,
(5+5)/2 = 10/2 = 5
The 1st quartile or Q1 = 5
What is number 3 please
Answers
Which square root is between 4 and 5?
A. √ 10
B. √ 14
C. √24
D. √ 32
Answers
To answer this, square both 4 and 5.
4^2 = 16
5^2 = 25
So the number you’re looking for under a square root needs to be between 16 and 25. 24 is the only number that fits the bill.
The answer is C.
3456.8 round the number below to the nearest whole number one place
Answers
Answer:
=3457,0 =3457
Step-by-step explanation:
What is the most precise (smallest) subset of real numbers that the following numbers
belong in?
17
Answers
Answer:
Even numbers are integers that have 2 as a factor; odd numbers are all the other integers. Prime numbers are integers that have only themselves and 1 as factors. Perfect numbers are integers whose factors add up to the number. The smallest perfect number is 6 and its factors, 1, 2 and 3 add up to 6.
Step-by-step explanation:
which reflection carries parallelogram QRST onto itself?
Answers
Step-by-step explanation:
that 180° and 360° clockwise and counterclockwise rotations about this point will carry the parallelogram onto itself.
The parallelogram forms the angle [tex]180[/tex] degree and [tex]360[/tex] degree.
What is the parallelogram?
A parallelogram is a flat shape with four straight, connected sides so that opposite sides are congruent and parallel.
This means a parallelogram is a plane figure, a closed shape, and a quadrilateral.
If we rotate it in clockwise then it covers the angle [tex]180[/tex] degree and [tex]360[/tex] degree whether it is in clockwise or in anticlockwise.
Hence, the parallelogram forms the angle [tex]180[/tex] degree and [tex]360[/tex] degree.
To know more about the parallelogram
https://brainly.com/question/28854514`
#SPJ2
Create a 2-step equation
that has p = 0.5 as its
solution.
pls help! :)
Answers
2 1/2 = 1
1 + 7 = 8
Two step equations are equations which take 2 steps to solve. Let's create our equation now.
2p + 2 = 3
If you'd like, you can solve it to ensure it's correct.
2p + 2 = 3
Subtract 2 from both sides.
2p = 1
Divide both sides by 2
p = 0.5
Is (3,4) a solution of - 4x + 7y = - 12?
Answers
Answer:
No
Step-by-step explanation:
Plug x (3) and y (4) in to see if it equals -12.
Can someone help me do this?
Thank y’all! Extra points on this because it’ll take some time.
Answers
Step-by-step explanation:
everything can be found in the picture
Which diagram represents the following sets
Answers
Answer:
not sure what is the question
Step-by-step explanation:
what describes f(x) = |x|
Answers
Answer:
mean see weididjdbd ksksns e
Answer:
Let's take an example.
If you put the value of x as 1, it gives one.
Even if you put 3.997654, it will give 3.997654.
But for any negative real number, it gives the same number but not with it's negative sign. Like if x =-3/7,
It will give 3/7.
The notation used here means it is the modulus function.......
HELP WILL MARK BRainlIEST WITH EXPLANATION
Answers
[tex]Hello[/tex] [tex]There![/tex]
The answer is...
[tex]y=-8x+15.[/tex]
HERE'S THE EXPLANATION!
Let's solve for y.
[tex]8x+y=15[/tex]
Step 1: Add -8x to both sides.
[tex]8x+y+-8x=15+-8x[/tex]
[tex]y=-8x+15[/tex]
THE ANSWER!
[tex]y=-8x+15[/tex]
Hopefully, this helps you!!
[tex]AnimeVines[/tex]
Solve the equation
6x - 10 - 4x = 6x-5
HOME
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
O A. The solution is
(Type an integer or a simplified fraction.)
B. The solution is all real numbers.
O C. There is no solution.
(Answer quickly)
Answers
9514 1404 393
Answer:
A. The solution is x = -5/4
Step-by-step explanation:
Collect terms:
2x -10 = 6x -5
Subtract 2x:
-10 = 4x -5
Add 5:
-5 = 4x
Divide by the coefficient of x:
-5/4 = x
The solution is x = -5/4.
Despite the large number of questions Allison missed on her final exam in Organic Chemistry, her score was listed as being in the 72nd percentile of scores for all students. Her score falls
a. between the first quartile and the median.
b. between the minimum and the first quartile.
c. between the third quartile and the maximum
d. between the median and the third quartile.
Answers
Answer:
A
Step-by-step explanation:
1,000,000,000,000 x 4
How do you write this with an exponet of 10
Answers
Answer:
12
Step-by-step explanation:
their is 12 zeros so it's 12
Sam bought 6 pounds of soil and 8 pounds of bricks. How many more pounds of bricks did he buy than soil
Answers
The high temperature for a day in January is 7°F the low temperature that day was "-5°F" what is the difference in temperatures
Answers
Answer:
The answer is 12
Step-by-step explanation:
first you count 1,2,3,4,5,6,7
after you do that when you go down to the negatives you are at -1,-2,-3,-4,-5 which is 5 numbers
so 7+5=12
is -3/4 a rational number?
pls help
Answers
Answer:
Yes
Step-by-step explanation:
-3/4 is a rational number because it can be written as a fraction.
Hope it helps :)
What will be the resultant sogn if we mutilply 15 negative integers and 6 positive integers
Answers
Answer:
resultant will be negative
Step-by-step explanation:
mark me as brainliest ❤️
