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pshichka [43]
3 years ago
15

Identify the property demonstrated by the equation. x + (3 + 5 ) = (x + 3 ) + 5

Mathematics
1 answer:
Darina [25.2K]3 years ago
3 0
It is called associated property.
The ( ) are moved around, but the answer will be the same.
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A box contains four blue and eight red balls. Jim and Jack start drawing balls from the box, respectively, one at a time, at ran
aleksandrvk [35]

Answer:

the probability that Jack draws the blue ball is 0.38539

Step-by-step explanation:

Given the data in the question;

box contains

blue balls = 5

red balls = 8

Jim and Jack start drawing balls from the box, respectively, one at a time, at random, and without replacement

Now,

on the first attempted;

⇒ ( 8/13) × ( 5/12) = 10/39  

on the second attempt;

⇒ ( 8/13 ) ( 7/12) ( 6/11 ) ( 5/10 ) = 14/143

on the third attempt;

⇒ ( 8/13 ) ( 7/12) ( 6/11 ) ( 5/10 ) ( 4/9 ) ( 5/8 ) = 35/1287

on the fourth attempt;

⇒  ( 8/13 ) ( 7/12) ( 6/11 ) ( 5/10 ) ( 4/9 ) ( 3/8 ) ( 2/7 ) ( 5/6 ) = 5/1287

so we add everything;  

⇒ 10/39 + 14/143 + 35/1287 + 5/1287

= 0.38539

Therefore, the probability that Jack draws the blue ball is 0.38539

5 0
3 years ago
Which of the following situations provides the strongest evidence that a coin is NOT fair?
Kamila [148]

Answer:

D

Step-by-step explanation:

A coin has two sides. A side tagged the head and the order side tagged the tail.

By mathematical and probabilistic standards, a fair coin is a coin which has equal value of probabilities for head turning up as well as tail turning up.

what we are saying here is that for a fair coin, P(H) = P(T) = 0.5 or 1/2

Any option or value short of this will make the coin unfair. Whenever we are having the probability of the head greater than the probability of the tail or vice versa, then the coin in question has become unfair.

Now back to the options, by observation, expressing each of the options to the smallest numbers will yield 7/10.

Let’s have a decimal value of each go drive home the point;

7/10 = 0.7

70/100 = 0.7

700/1000 = 0.7

Thus the probability of the head which is meant to be 0.5 is now given as 0.7 which shows that the coin is unfair in all three options since in the real sense they are all same numbers written in different form which of course is not the 0.5 value we should have for a fair coin for probability of getting a head

8 0
3 years ago
Find the equation for the inverse of the relation <br> Y=2x+1
Naddik [55]
I thank the answer is 4

8 0
3 years ago
What the answer is I don't get it
NISA [10]

The answer is 1/2 because 1 = 2/2 3/2 minus 2/2 = 1/2

6 0
3 years ago
Read 2 more answers
GIVING BRAINLIEST PLEASE ANSWER
klasskru [66]

Answer:

Step-by-step explanation:

aww im sorry i dont no i wish i knew but you dont need to give me anything im stupid

7 0
3 years ago
Read 2 more answers
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