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3 years ago

Which of the following numbers can be expressed as repeating decimals?

Mathematics

2 answers:

Alika [10]3 years ago

4 0

Answer:

The only one that works is 7/9

Step-by-step explanation:

The answer would be 0.7 repeating. The seven repeats

4/5 is 0.8 so that doesn’t work

5/8 is 0.625 so that doesn’t work

VashaNatasha [74]3 years ago

4 0

7/9 would be the answer

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2x − 4y = 40, −x + 2y = −20 Find x and y intercept

Basile [38]

Answer:

The x and y intercept are (20,0)

Step-by-step explanation:

2x-4y=40—eqn1

-x+2y=-20—eqn2

Make x the subject of eqn2

-x=-20-2y

x=20+2y

plug this into eqn 1

2(20+2y)+4y=40

40+4y+4y=40

8y=40-40

y=0

plug y=0 into eqn2

-x+2(0)=-20

-x=-20

x=20

8 0

2 years ago

A track star runs two races on a certain day. The probability thathe wins the first race is 0.7, the probability that he wins th

NARA [144]

Answer:

a) 80% probability that he wins at least one race.

b) 30% probability that he wins exactly one race.

c) 20% probability that he wins neither race.

Step-by-step explanation:

We solve this problem building the Venn's diagram of these probabilities.

I am going to say that:

A is the probability that he wins the first race.

B is the probability that he wins the second race.

C is the probability that he does not win any of these races.

We have that:

$A = a + (A \cap B)$

In which a is the probability that he wins the first race but not the second and $A \cap B$ is the probability that he wins both these races.

By the same logic, we have that:

$B = b + (A \cap B)$

The probability that he wins both races is 0.5.

This means that $A \cap B = 0.5$

The probability that he wins the second race is 0.6

This means that $B = 0.6$

$B = b + (A \cap B)$

$0.6 = b + 0.5$

$b = 0.1$

The probability that he wins the first race is 0.7.

This means that $A = 0.6$

$A = a + (A \cap B)$

$0.7 = a + 0.5$

$a = 0.2$

A) he wins at least one race.

This is

$P = a + b + (A \cap B) = 0.2 + 0.1 + 0.5 = 0.8$

There is an 80% probability that he wins at least one race.

B) he wins exactly one race.

This is

$P = a + b = 0.2 + 0.1 = 0.3$

There is a 30% probability that he wins exactly one race.

C) he wins neither race

Either he wins at least one race, or he wins neither. The sum of these probabilities is 100%.

From a), we have that there is an 80% probability that he wins at least one race.

So there is a 100-80 = 20% probability that he wins neither race.

6 0

3 years ago

A company makes 100 bags. 32 of the bags have buttons but no zips. 32 of the bags have zips but no buttons. 35 of the bags have

elena-14-01-66 [18.8K]

Answer:

Step-by-step explanation:

6 0

3 years ago

What's 16 divided by 2/3

Brilliant_brown [7]

16 divided by 2/3 is 2.66666666667

4 0

3 years ago

Read 2 more answers

Please help! with work shown !

BARSIC [14]

Answer:

#10: 5/36

#11: 5/6

Step-by-step explanation:

#10:

The following combinations will get you 6.

1 - 5

2 - 4

3 - 3

4 - 2

5 - 1

These are only 5 of the 36 possible combinations, so you have 5/36 of a chance to get a combo of equal 6.

#11:

Like with #10, list the possible combinations that will get you 7.

1 - 6

2 - 5

3 - 4

4 - 3

5 - 2

6 - 1

That's only six combinations, but we're not including those. Subtract 6 from 36 to get 30. 30/36 simplifies to 5/6 (GCF of 30 & 36 is 6), so that is the answer to #11.

5 0

3 years ago