Answer:
70
Step-by-step explanation:
four books can be made from eight different books
4 books to be chosen from 8 books
The order does not matters so we use Combination.
four books can be made from eight different books, so we find 8C4
![nCr= \frac{n!}{r!(n-r)!}](https://tex.z-dn.net/?f=nCr%3D%20%5Cfrac%7Bn%21%7D%7Br%21%28n-r%29%21%7D)
![8C4= \frac{8!}{4!(8-4)!}](https://tex.z-dn.net/?f=8C4%3D%20%5Cfrac%7B8%21%7D%7B4%21%288-4%29%21%7D)
![8C4= \frac{8!}{4!(4)!}](https://tex.z-dn.net/?f=8C4%3D%20%5Cfrac%7B8%21%7D%7B4%21%284%29%21%7D)
![8C4= \frac{8*7*6*5*4!}{4!(4)!}=70](https://tex.z-dn.net/?f=8C4%3D%20%5Cfrac%7B8%2A7%2A6%2A5%2A4%21%7D%7B4%21%284%29%21%7D%3D70)
Answer:
I would believe that it would be close 7 whatever is closest to seven bro
Answer:
1. ![(b+8)^{2}](https://tex.z-dn.net/?f=%28b%2B8%29%5E%7B2%7D)
2. ![-3k(k^{2} -5k+2)](https://tex.z-dn.net/?f=-3k%28k%5E%7B2%7D%20-5k%2B2%29)
3. ![(3x-1)(x-5)](https://tex.z-dn.net/?f=%283x-1%29%28x-5%29)
Step-by-step explanation:
1. Both
and 64 are perfect squares, meaning
is twice the product of x and 8. Since all signs are positive, the equation would be:
. Let
and
. Answer:
or
.
2. Since -3 is a factor of all 3 terms, factor out the -3 which makes,
. K is also a common factor, so you would factor that out too,
. Then simply, find the two factors whose product is -2 and whose sum is -5. Answer:
.
3. By factoring
, you would break the expressions in the group=
. Then, factor out "x" from
. Factor out "5" from
=
. Finally, factor out the common term "3x-1" = ![(3x-1)(x-5)](https://tex.z-dn.net/?f=%283x-1%29%28x-5%29)
Answer:
6
Step-by-step explanation:
cancel out 5 by multiplying its by 5, what you do to one side you do to the other. so you also multiply 12 by 5. and you should get 60
96 Percent, nice job man :D