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VARVARA [1.3K]
3 years ago
6

Use Pascal's triangle to find 6C3

Mathematics
2 answers:
katrin2010 [14]3 years ago
5 0
Ignore tht pascal triangle its way too inefficient
Formula nCr = n! /r! (n-r)!
So 6C3= 6!/3!(6-3)!=20
Lena [83]3 years ago
4 0

Using Pascal's triangle

Number of terms                                                    Expression

   1  =                                   1----------------------------(x+a)^0

   2 =                                1        1----------------------------(x+a)

  3 =                         1         2          1-----------(x+a)^2

 4=                     1         3            3         1----------(x+a)^3

 5=                 1          4         6         4        1----------(x+a)^4

6=          1           5            10        10         5       1----------(x+a)^5

7=       1             6            15          <u>20 </u>       15         6      1 ----------(x+a)^6

8=     1             7             21          35        35        21      7      1 ----------(x+a)^7

The meaning of _{3}^{6}\textrm{C} , is coefficient of fourth term of an expression having 7 terms.

Using pascal Triangle value  or coefficient of Fourth term of the expression

(x+a)^6=\\\\\text{will be}\\\\_{3}^{6}\textrm{C}=20

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Nancy is saving $2 from her allowance every week. Marco is saving $1 the first week, $2 the second weeks, who will have saved mo
maxonik [38]
Nancy would have because she saved 2 each week and had a total of 4 dollars and Marco saved 1 dollar the first week and saved 2 dollars the second week and had a total of 3 dollars so Nancy had 1 dollar more than Marco

8 0
3 years ago
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Can someone help me I’ll Mark brainliest I been struggling with this one :(
mariarad [96]

Answer:

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Step-by-step explanation:

5 0
2 years ago
Sarah Meeham blends coffee for Tasti-Delight. She needs to prepare 160 pounds of blended coffee beans selling for $4.97 per poun
jok3333 [9.3K]
Given:
let h be the high quality bean
let c be the cheaper bean

h + c = 160
6h + 3.25c = 160*4.97
6h + 3.25c = 795.20

h = 160 - c
6(160 - c) + 3.25c = 795.20
960 - 6c + 3.25c = 795.20
-2.75c = 795.20 - 960 
-2.75c = -164.80
c = -164.80 / -2.75
c = 59.92 or 60 lbs

h = 160 - c
h = 160 - 60
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Sarah should blend 60 lbs of cheap coffee bean and 100 lbs of high quality coffee bean.
3 0
3 years ago
Please help me with these problems
S_A_V [24]

Answer:

1.a=2

2.  C  x=2  and x=-3

Step-by-step explanation:

The standard form for the quadratic function is  

ax^2 +bx+c

so  we need to rewrite the function to be in this form

2x^2 -10 = 7x

Subtract 7x from each side

2x^2 -7x-10 = 7x-7x

2x^2 -7x-10 = 0

a =2, b= -7  c=-10


2.  The quadratic formula is

-b ± sqrt(b^2 -4ac)

----------------------------

2a


2x^2 + 2x=12

Lest get the equation in proper form

2x^2 + 2x-12 = 12-12

2x^2 +2x-12 =0

a=2  b=2 c=-12

Lets substitute what we know

-2 ± sqrt(2^2 -4(2)(-12))

----------------------------

2(2)

-2 ± sqrt(4+96)

----------------------------

2(2)

-2 ± sqrt(100)

----------------------------

4

-2 ± 10

----------------------------

4

-2 + 10               -2-10

-----------   and  --------------

4                             4

8/4   and -12/4

2  and -3

8 0
3 years ago
Y * 3 = 81 please i need it for today
BaLLatris [955]

Answer:

Y = 27

Step-by-step explanation:

Y * 3 = 81

Divide each side by 3

Y * 3/3 = 81/3

Y = 27

4 0
2 years ago
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