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
pshichka [43]
3 years ago
5

Simplify the expression 6C2

Mathematics
1 answer:
iVinArrow [24]3 years ago
8 0

Answer:

^6C_2=15

Step-by-step explanation:

Recall the formula:

^nC_r=\frac{n!}{(n-r)!r!}

We apply this formula to simplify ^6C_2

This implies that:

^6C_2=\frac{6!}{(6-2)!2!}

^6C_2=\frac{6!}{4!2!}

^6C_2=\frac{6\times5\times4!}{4!\times 2\times1}

This simplifies to

^6C_2=\frac{6\times5}{2\times1}

^6C_2=\frac{3\times5}{1\times1}=15

You might be interested in
. Sara collected $135 in donations for the hospital. This represents 5% of the total amount collected by her class. How much did
AfilCa [17]
5 percent of 2700 is 135 so the answer is $2700

6 0
3 years ago
Read 2 more answers
Solve each system by elimination.
strojnjashka [21]

Answer:

y = -1, x = -2

Step-by-step explanation:

First, multiply the top equation by 2 to make 3x become 6x:

6x - 8y = -4

Second, multiply the bottom equation by 3 to make -2x become -6x:

9y - 6x = 3

Add the two equations together, and you get:

y = -1

Plug in y as -1 into the first or second equation:

3x - 4(-1) = -2

OR

3(-1) - 2x = 1

x = -2

5 0
3 years ago
1. m∠QPR =<br><br> 2. m∠QTP =<br><br> 3. RP =<br> Show all the work
alex41 [277]

Answer:

1. 30°

2.90°

3. 12 units

Step-by-step explanation:

I can't believe there's nothing confirming that this is a parallelogram/a rhombus?! Assuming is awful, and I wish you could say you can't know for sure lol but for the sake of this answer, let's just call it a rhombus. (There was probably some context elsewhere that you didn't put over here, hopefully.)

1.

The reason I say this is: in a rhombus, the diagonals bisect the angles. This means that the diagonals split the angles they meet into two equal parts. That way, it would make sense. m∠QPR=m∠SPR=30°.

2.

If it is a rhombus, the diagonals are perpendicular to each other, so m∠QTP should be 90°.

3.

Diagnonals in a rhombus (and in any parallelogram) bisect each other, so PT=TR=6, and RP=PT+TR=12 units.

Sorry if this is all dreadfully wrong, and I hope I helped you!

7 0
3 years ago
True or false <br> The volume of a rectangular prism is always measured in cubic units?
Sindrei [870]

False

Step-by-step explanation:

yoijyngntintngngkgkgkkgnggf

3 0
3 years ago
Which of the following is an example of a false negative?
Mademuasel [1]
Test results indicate that a woman is not pregnant when she is
8 0
3 years ago
Read 2 more answers
Other questions:
  • Why multiplying the numerator and denominator of a fraction by the same number results in an equivalent fraction?
    15·1 answer
  • Marla is looking for a new car. She has test-driven two cars but can only purchase one. The probability that she will purchase c
    6·2 answers
  • Which question could be answered by the organized list shown? Select two answers. XXX, XXY, XYX, XYY , YXX, YXY, YYX, YYY A. a f
    10·2 answers
  • Afire hydrant that is 2 3/4 feet tall casts a shadow that 2 feet long. Find the length of the shadow cast by a nearby 154-foot t
    6·1 answer
  • Ted wanted to determine if one brand of paper towels​ (Brand A) was stronger than another brand​ (Brand B). He performed a study
    7·1 answer
  • I WILL GIVE BRAINLIEST!!!
    9·1 answer
  • Everyone REPORT "Thebrojose" he puts links in his "answers" don't click on them its a scam or virus
    6·2 answers
  • Without finding the quotient, is the value of the expression (-3 1/3 + 3 1/2) ÷ (-1/4) positive or negative? Explain.
    13·1 answer
  • Help me please
    10·1 answer
  • Select the TWO multiplication equations that could represent the following question: how many 3/8s are in 5/4
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!