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lyudmila [28]
2 years ago
5

Need help, will give 100 points

Mathematics
2 answers:
Monica [59]2 years ago
6 0

Answer:

Already answered on the other one

Step-by-step explanation:

tiny-mole [99]2 years ago
4 0
  • f(x)=2x²-x
  • g(x)=x+1

#1

\\ \rm\Rrightarrow (gof)(-1)

\\ \rm\Rrightarrow g(f(-1))

\\ \rm\Rrightarrow g(2(-1)^2-(-1))

\\ \rm\Rrightarrow g(2+1)

\\ \rm\Rrightarrow g(3)

\\ \rm\Rrightarrow 3+1

\\ \rm\Rrightarrow 4

#2

\\ \rm\Rrightarrow (fog)(-1)

\\ \rm\Rrightarrow f(g(-1))

\\ \rm\Rrightarrow f(-1+1)

\\ \rm\Rrightarrow f(0)

\\ \rm\Rrightarrow 2(0)^2-0

\\ \rm\Rrightarrow 0

#3

\\ \rm\Rrightarrow (gof)(x)

\\ \rm\Rrightarrow g(f(x))

\\ \rm\Rrightarrow g(2x^2-x)

\\ \rm\Rrightarrow 2x^2-x+1

#4

\\ \rm\Rrightarrow (fog)(x)

\\ \rm\Rrightarrow 2(x+1)^2-x

\\ \rm\Rrightarrow 2(x^2+2x+1)-x

\\ \rm\Rrightarrow 2x^2+4x+2-x

\\ \rm\Rrightarrow 2x^2+3x+2

#5

No they are not equal

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zysi [14]

Answer:

a) 0.000001539

b) 0.00001385

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Step-by-step explanation:

Since there are 52 deck of cards, and the hand of the poker is 5 set, then the total number of hands achievable would be

T = 52! / 5!(52 - 5)!

T = 52! / 5! 47 !

T = 2598560 possibilities.

a) There are 4 ways of getting a royal flush. So the probability of getting a royal flush is

4 / 2598560 =

0.000001539

b) There are 9 hands from the 5 card hands, and also, there are 4 possible suits. So then, the probability is

9 * 4 / 2598560 =

36 / 2598560 =

0.00001385

c) There are 13 possible ways to get a four of a kind, since there are 5 cards with the poker, the remaining would be taken from the 48 remaining cards, thus

13 * 48 / 2598560 =

624 / 2598560 =

0.0002401

d) 3 of a kind in conjunction with a pair is needed to form a full house. This 3 of a kind can be gotten from any 4 suits. Then again, the pair has two cards with the same face value. So,

4! / 2! (4 - 2)! =

4! / 2! 2! = 6

That means, there are 6 possible ways to get our needed suits. Then, the probability of getting a full house is

13 * 4 * 12 * 6 / 2598560 =

3744 / 2598560 =

0.001441

e) To get a flush, all the 5 cards in the hand needs to have the same suit. Now, there are 13 different types of cards with only 5 cards being in the hand, thus

13! / 5! (13 - 5)! =

13! / 5! 8! = 1287

Now, recall that the question specifically asked us not to include any straight. There are 10 straights that can be gotten, and thus, we subtract it.

1287 - 10 = 1277

Since there are 4 suits, the probability of getting a flush is

1277 * 4 / 2598560 =

5108 / 2598560 = 0.001966

5 0
4 years ago
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