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Andru [333]
3 years ago
10

In how many ways can you select a committee of four students of a group of nine students?

Mathematics
1 answer:
egoroff_w [7]3 years ago
7 0

Answer:

126

Step-by-step explanation:

n! / (r! (n-r)!)

In this case n = 9 and r = 4

9!/ (4! * (9-4)!)

9!/ (4! * 5!)

= 126

9! = 9x8x7x6x5x4x3x2x1

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Im seriously in need of help anybody im not joking around please!!!!!
marishachu [46]

Answer:

A.) = 6

If RE = 12, then RD = 6

B.) = 10

If BR = 10, then BE = 10

C.) = 16

If BD = 8, then BK = 16

D.) = 30*

<m9 = 90*, and <m2 = 60*, so add them and subtract from 180*, you are left with <m1 = 30*

E.) = 60*

If <m2 = 60*, then <m3 = 60*

F.) = 90*

It`s a 90* angle because BK and RE and perpendicular

G.) = 60*

If <m1 = 30*, then multiply by two because it is symmetrical

I would show all my work but you seem to be in a rush. Hope this helps!

4 0
2 years ago
What is the length of the third side of the window frame ??
drek231 [11]
A^2+b^2=c^2
A=63
B=?
C=87
63^2+b^2=87^2
3969+b^2=7569
-3969 both sides
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5 0
3 years ago
Read 2 more answers
If a pond is 6m by 15m, will 40m of fencing will be enough to fenced a pond
olchik [2.2K]

6m + 6m + 15m + 15m = 42m

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8 0
3 years ago
solve this problem by using a 5d process or writing and solving an equation. No matter which method you use, be sure to define y
marysya [2.9K]

Answer:

width of the rectangle=x=4in and length of the rectangle=11in

Step-by-step explanation:

Let the width of the rectangle be x, then according to the question, length is one less than three times its width that is l=3x-1.

Now, width=b=x and length=l=3x-1, thus

Perimeter of the rectangle= 2(l+b)

⇒30=2(3x-1+x)

⇒15=(3x-1+x)

⇒15=4x-1

⇒16=4x

⇒x=4in

Thus, width of the rectangle=x=4in and length of the rectangle=l=3x-1=3(4)-1=12-1=11in.

5 0
3 years ago
What is the value of the exponential expression below?
7nadin3 [17]
The square root of 64 is 8 but put 8 to the 1/2 power
The answer is 4
7 0
3 years ago
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