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
Vadim26 [7]
3 years ago
13

How many two person can be picked out of a group of 7

Mathematics
1 answer:
lawyer [7]3 years ago
7 0
{7 \choose 2}=\dfrac{7!}{2!5!}=\dfrac{6\cdot5}{2}=3\cdot5=15
You might be interested in
Please help me only answer number 17 !!<br><br> Vote you brainiest
Vlada [557]
6 packs of glitter pens, 9 packs of stickers and, 12 packs of balls
4 0
3 years ago
What is 3.56 x 10^-5 in standard form?
Temka [501]
Well here is your first part...

3.56×10^-5

Its negative so go to the left:

=.00000356

Here is your second part...

4×10^4×3×10^4

There both positive so go to the right

=40000 =30000

Then you multiply....

40000×30000=

= 1200000000

Here's your third part...

You need to divide 31 by 117

31÷117=

=0.2650%


7 0
3 years ago
Someone can help?? ​
oee [108]

Answer:

Step-by-step explanation:

let  cos^{-1}x=t

cos t=x

when x=1,cos t=1=cos 0

t \rightarrow 0

\lim_{x \to 1} \frac{1-\sqrt{x}}{(cos ^{-1}x)^2 } \\= \lim_{t \to 0} \frac{1-\sqrt{cos~t}}{t^2} \times \frac{1+\sqrt{cos~t}}{1+\sqrt{cos ~t}} \\= \lim_{t \to 0} \frac{1-cos~t}{t^2(1+\sqrt{cos~t})}}  \\= \lim_{t \to 0 }\frac{2 sin^2~\frac{t}{2}}{t^2(1+\sqrt{cos~t})}} \\= 2\lim_{t \to 0 }(\frac{sin~t/2}{\frac{t}{2} })^2 \times \frac{1}{4} \times  \lim_{t \to 0 }\frac{1}{1+\sqrt{cos~t}} \\=\frac{2}4} \times 1^2 \times \frac{1}{1+\sqrt{cos~0}} \\=\frac{1}{2} \times \frac{1}{1+1} \\=\frac{1}{4}

4 0
3 years ago
Which of the following inequalities are true A.10 &lt; 9, B. 9 &lt; 10, C. 10 &gt; 9, D. 9 (is less than or equal to ) 10
Thepotemich [5.8K]

Answer:

B. 9 < 10,  

C. 10 > 9,  

D. 9 (is less than or equal to ) 10

Step-by-step explanation:

A.10 < 9,   not true  10 is greater than 9

B. 9 < 10,   true  9 is less than 10

C. 10 > 9,   true 10 is greater than 9

D. 9 (is less than or equal to ) 10  true 9 is less than or equal to 10

5 0
3 years ago
The equation for decibels and sound intensity is D=10log(sub 10) I/I(sub0) where D is decibels.
velikii [3]
D=10\log\dfrac{I}{I_0}\\\\&#10;D=10\log\dfrac{10^{11}}{10^{-12}}\\&#10;D=10\log10^{23}\\&#10;D=10\cdot23=\\&#10;D=230
6 0
3 years ago
Other questions:
  • What is the end behavior of the graph of the polynomial function f(x) = –x5 + 9x4 – 18x3?
    8·2 answers
  • Given ABCD, solve for x.
    5·2 answers
  • Yan is climbing down a ladder. Each time he descends four rungs on the ladder, he stops to see how much farther he has to go. Wh
    7·2 answers
  • . The coach splits a team of 27 students into 3 groups to practice skills. How many c
    15·2 answers
  • What is 2 and 2/3 + 1 and 1/2
    11·2 answers
  • Identify the vertex, axis of symmetry, maximum or minimum, and domain and range of the function. F(x)=2(x+9)^2 -4
    15·1 answer
  • I need help with this
    6·1 answer
  • What is seven less than the product of four and a number in numeric form. PLZZ I will give you 100 points
    13·2 answers
  • Identify what type of polygon this is based on its number of sides. Is this a regular polygon why or why not?
    7·1 answer
  • An ant walk around a piece of a leaf that is in the shape of a right triangle. What is the total distance the ant traveled?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!