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notsponge [240]
3 years ago
12

If n = 5 and r = 3 Find "Cr.​

Mathematics
2 answers:
Marat540 [252]3 years ago
3 0

Answer:

Cr = 10

Step-by-step explanation:

To calculate combinations we use the nCr formula: nCr = n! / r! * (n - r)!, where n = number of items, and r = number of items being chosen at a time.

C(n,r)=[?]

C(n,r)=C(5,3)

=\frac{5}{(3!(5-3)!)}

=\frac{5!}{3!*2!}

=10

[RevyBreeze]

Lena [83]3 years ago
3 0

Answer:

Pi*r^2

Step-by-step explanation:

If your finding circumfrence the equation is Pi*r^2

So your equation would be 3.14*3^2

So 3^2 would be 3*3=9

Multiply 9 by 3.14

your answer would be 28.26

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True or False: The variables in the equation 4x-(5y)2=64x-(5y)2=6 are 4, 5, and 6
aleksley [76]

Answer: False

Step-by-step explanation:

4x - (5y) 2 = 64x - (5y) 2 = 6

Identify the variables:

4x, 5y, 64x

So, it would actually be:

4, 5, and 64

6 0
3 years ago
Verify sin2θ/1+cos2θ =tanθ
Andrej [43]

Answer:

LHS.= Sin 2x /( 1 + cos2x )

We have , sin 2x = 2 sinx•cosx

And. cos2x = 2cos^2 x - 1

i.e . 1+ cosx 2x = 2cos^2x

Putting the above results in the LHSwe get,

Sin2x/ ( 1+ cos2x ) =2 sinx•cosx/2cos^2x

=sinx / cosx

= Tanx

.•. sin2x/(1 + cos2x)= tanx

Step-by-step explanation:

4 0
3 years ago
F(-3)<br><br> f(x)= 3 to the power of x
____ [38]
1/27
See attached picture
4 0
2 years ago
Circle O is shown. Line segments B O and O C are radii. Point A is on the circle and is not within angle B O C.
Paha777 [63]

The ratio of major to minor arc = 2 : 1

What is a Circle?

A circle is the locus of a point such that its distance from a fixed point (center) is always constant.

Calculation

The length of an arc (L) with center angle θ is given by:

                                          L = (θ/360) * 2πr

where r is the radius.

Putting the values in the above formula.

For the major arc:

L = (240/360) * 2πr

For the major arc:

l = ((360-240)/360) * 2πr

l = (120/360) * 2πr

The ratio of major to minor arc = [(240/360) * 2πr] / [(120/360) *2πr] = 2 : 1

The ratio of major to minor arc = 2 : 1.

Learn more about the circle here:

brainly.com/question/15125799

#SPJ1

5 0
2 years ago
Page 1:
Tema [17]

Answer:

i think it would be number 3.

Hope this helps.

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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