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Inessa05 [86]
3 years ago
8

Help me please it's equations and inequalities

Mathematics
1 answer:
VladimirAG [237]3 years ago
7 0

Step-by-step explanation:

5x - 7(x + 1) >  - 9 \\  \\ 5x - 7x - 7 >  - 9 \\  \\  - 2x - 7 >  - 9  \\  \\  - 2x >  - 9 + 7 \\  \\  - 2x - 2 \\  \\ x <  -  \frac{2}{2}  \\  \\ x < 1

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Suppose that computer literacy among people ages 40 and older is being studied and that the accompanying tables describes the pr
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Answer:

Step-by-step explanation:

The complete question is given thus:

Suppose that computer literacy among people ages 40 and older is being studied and that the accompanying tables describes the probability distribution for four randomly selected people, where x is the number that are computer literate. Is it unusual to find four computer literates among four randomly selected people?

x      P(x)

0     0.16

1      0.25

2     0.36

3      0.15

4      0.08

  • Yes
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ANSWER:

The odds that this will occur according to the chart are 0.08, or 8%, so although this is unlikely, it's not terribly unusual.

⇒ NO

So from the following we can say it is not unusual to find four (4) computer literates among four randomly selected people.

ok, so P(1) + P(2) + P(3) + P(4) + P(0)  = 0.16+0.25+0.36+0.15+0.08 = 1

Whereas the chance of finding four (4) out of four (4) computer iteration is low when compared to other factors.

cheers i hope this helped  !!

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