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3 years ago

-3x > 12. Help thanks

Mathematics

2 answers:

Sindrei [870]3 years ago

7 0

Answer:

x<-4 i hope i help plz mark me brailist

Debora [2.8K]3 years ago

7 0

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$- 3x > 12$

Add sides 3x

$+ 3x - 3x > + 3x + 12$

$0 > 3x + 12$

$3x + 12 < 0$

Subtract sides 12

$3x + 12 - 12 < 0- 12$

$3x < - 12$

Divide sides by 3

$\frac{3x}{3} < \frac{ - 12}{3} \\$

$x < - 4$

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Sindrei [870]

Answer:

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And replacing we got:

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And replacing we got:

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And the deviation:

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Step-by-step explanation:

We have the following distribution

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Part a

For this case:

$P(X=3) = 0.1$

Part b

We want this probability:

$P(X\geq 3) =1-P(X$

And replacing we got:

$P(X \geq 3) = 1- [0.2+0.3+0.1]= 0.4$

Part c

For this case we want this probability:

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Part d

$P(X=0) = 0.2$

Part e

We can find the mean with this formula:

$E(X)= \sum_{i=1}^n X_i P(X_i)$

And replacing we got:

$E(X) =0*0.2 +1*0.3+2*0.1 +3*0.1 +4*0.3= 2$

Part f

We can find the second moment with this formula

$E(X^2)= \sum_{i=1}^n X^2_i P(X_i)$

And replacing we got:

$E(X^2) =0^2*0.2 +1^2*0.3+2^2*0.1 +3^2*0.1 +4^2*0.3= 6.4$

And the variance would be:

$Var(X0 =E(X^2)- [E(X)]^2 = 6.4 -(2^2)= 2.4$

And the deviation:

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DedPeter [7]

Answer:

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PIT_PIT [208]

Answer:

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Step-by-step explanation:

the graph you will have to do yourself.

just go there and type in

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well, don't type "log" in letters.

you start by typing the "-" sign, and then you need to look up the functions by clicking on the "funcs" button and look for the log functions .

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