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3 years ago

9

How are these triangles congruent

1 answer:

tigry1 [53]3 years ago

3 0

Side, angle and side
answer is C.

SAS

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Let represent the number of tires with low air pressure on a randomly chosen car. The probability distribution of is as follows.

Sindrei [870]

Answer:

a) $P(X=3) = 0.1$

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

And replacing we got:

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

c) $P(X=4) = 0.3$

d) $P(X=0) = 0.2$

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

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

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:

$\sigma =\sqrt{2.4} = 1.549$

Step-by-step explanation:

We have the following distribution

x 0 1 2 3 4

P(x) 0.2 0.3 0.1 0.1 0.3

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:

$P(X=4) = 0.3$

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:

$\sigma =\sqrt{2.4} = 1.549$

4 0

3 years ago

How would I go about solving this?

Sphinxa [80]

Answer:

is10 <em>wififklwldlfosos</em>

6 0

3 years ago

Write a phrase for each expression.

AveGali [126]

Step-by-step explanation:

HERE

* 11x

Phrase= x times 11

Operation= times

* 8-y

Phrase= 8 minus y

Operation = minus

1- 7n

2- 4-y

3- 13 + x

4- x divided by 12

5- y times 10

6- c added to 3

4 0

3 years ago

A pack or cardinal flower seeds cost $4.00 and a pack of petunia flower seeds cost $2.50. You buy the same number of packs of ea

jeyben [28]

Answer:

6 packs

Step-by-step explanation:

you add $4.00 and $2.50 together, and get 6.50 and then divide 39 bye $6.50

4 0

4 years ago

Identify the slope of the line for the equation y = −9x − 7

Alex Ar [27]

Answer:

the slope is -9x

Step-by-step explanation:

whatever has x next to it is the slope

8 0

3 years ago

Read 2 more answers