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Natali5045456 [20]
3 years ago
11

4.47 Consider an experiment, the events A and B, and probabilities P(A) 5 0.55, P(B) 5 0.45, and P(A d B) 5 0.15. Find the proba

bility of: a. A or B occurring. b. A and B occurring. c. Just A occurring. d. Just A or just B occurring.

Mathematics
1 answer:
SVEN [57.7K]3 years ago
5 0

Answer:

a) 0.85

b) 0.15

c) 0.40

d) 0.70

Step-by-step explanation:

P(A) = 0.55

P(B) = 0.45

P(A n B) = 0.15

a) Probability of A or B occurring = P(A u B) = P(A) + P(B) - P(A n B) = 0.55 + 0.45 - 0.15 = 0.85

b) Probability of A and B occurring = P(A n B) = 0.15

c) Probability of just A occurring = P(A n B') = P(A) - P(A n B) = 0.55 - 0.15 = 0.40

d) Probability of just A or just B occurring = P(A n B') + P(A' n B) = 0.4 + (0.45 - 0.15) = 0.4 + 0.3 = 0.70

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The function g(x)=-(x)^2+5. The function f(x)=-g(x+2).
Vitek1552 [10]
Short Answer f(x) down 5 units, left 2 units and right side up from g(x)
Step One

Find out what -g(x+2) is.
There are two steps to this. The first is to deal with the minus sign
(g(x)) = - x^2 + 5. Be very careful what you do next. 
Put brackets around both terms on the right.
g(x) = (-x^2 + 5) Now put the minus sign in front of g(x) and another one in front of the brackets.
-g(x) = - (-x^2 + 5) Remove the brackets.
-g(x) = x^2 - 5 

<em>Result</em>
So far g(x) moves down 5 units and opens upward. 

Step Two
The second step is to see what the x + 2 does.
-g(x + 2) = (x + 2)^2 - 5

The final result is that the graph opens upward, moves left 2 spaces and down 5.

There is a graph enclosed to show you the key steps.
The red graph is g(x) = x^2 - 5
The blue graph is g(x+2) = (x+2)^2 - 5

5 0
3 years ago
Helppp!!! This has to be done by 8!!! And it’s 7:45!!
san4es73 [151]

Answer:

The constant of porportionality is k = 12.5; the equation that describes the relationship is y = 12.5x.

Step-by-step explanation:

When you divide the miles by the hours, it's always 12.5, meaning that k must be 12.5.

If x is the hours and k is 12.5, the equation that describes the relationship is y = 12.5x.

6 0
3 years ago
For these questions find the probability of drawing the given cards at random from a standard 52-card deck under each condition:
never [62]

Answer:

2

a) 6.37%

b) 6.25%

3

a) 0.60 %

b) 0.59 %

Step-by-step explanation:

2 )

a) With replacement

Probability of extracting a club is 13/52

Probability of extracting a spade is 13/51

13/52 * 13/51

= 6.37 %

b) Without replacement

13/52 * 13/52

= 6.25 %

3) With replacement

Probability of extracting a ace is 4/52

Probability of extracting a queen is 4/51

4/52 * 4/51

= 0.60 %

b) Without replacement

4/52 * 4/52

= 0.59 %

5 0
3 years ago
Which is the ordered pair
Pani-rosa [81]
Consider the point (-6,1):-
y  = 1 , x = -6 
substituting in the inequality:-
1 >= 1/3 * -6 + 4
1 > 2   which is not true so its not A 

Do same process for the other 3 choices
7 0
4 years ago
-4-7=? I dont really understand
Anit [1.1K]

-4 + -7= -11

When adding  negative numbers if the are both negative then you add them. When you have a negative and a positive you subtract.  In this problem they just took out the plus sign.

5 0
3 years ago
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