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3 years ago

Which set is a subset of every set? A. {} B. {0} C. {1}

Mathematics

2 answers:

postnew [5]3 years ago

6 0

Answer:

I'd say the answer is C

GarryVolchara [31]3 years ago

3 0

Answer: Choice A. { }

This is the empty set with nothing inside it. Another way to write the empty set is to use the symbol $\varnothing$

The set { 0 } is not the empty set because 0 is inside it, making it nonempty. A set like {1,2,3} does not contain 0, so there's no way {0} can be a subset.

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Larry bought a used boat for $2400 and sold it for 2000 two years later what was the percent of decrease

guajiro [1.7K]

It pretty much would be 400

3 0

3 years ago

Jason’s mom gave him 1,000 for his birthday. He put the money in the bank and decides to withdraw 25 per week.

Goshia [24]

Well 1000 for his birthday then subtract 25 each week, w, should be 1000-25w if i am not mistaken.

6 0

4 years ago

A report published by the Federal Reserve Bank of New York in 2012 reported the results of a nationwide study of college student

Degger [83]

Answer:

The proportion of borrowers who owe more than 54,000 is 0%.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Researchers found that the average student loan balance per borrower is $23,300.

This means that $\mu = 23300$

They also reported that about one-quarter of borrowers owe more than $28,000.

This means that the 1 subtracted by the p-value of Z is 0.25 when X = 28000, that is, when X = 28000, Z has a p-value of 0.75, so when X = 28000, Z = 0.675. We use this to find $\sigma$

$Z = \frac{X - \mu}{\sigma}$

$0.675 = \frac{28000 - 23300}{\sigma}$

$0.675\sigma = 4700$

$\sigma = \frac{4700}{0.675}$

$\sigma = 6963$

Estimate the proportion of borrowers who owe more than 54,000.

This is 1 subtracted by the p-value of Z when X = 54000. So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{54000 - 23300}{6963}$

$Z = 4.41$

$Z = 4.41$ has a p-value of 1

1 - 1 = 0

The proportion of borrowers who owe more than 54,000 is 0%.

3 0

3 years ago

Let D = {x| x is a student} be the domain, and let ƒ(x) = “date of birth” be the possible function. Determine if the relation is

shusha [124]

A relation is a function if the value in its Domain does not occur more than once. This means each domain value is paired with exactly one value of range.

In the given scenario, the domain is the students (e.g name of a student) and the function returns the date of birth of the student. A student can have only one date of birth. So it is not possible that a value in Domain(i.e. a student) is paired with more than one date of births.

Therefore, we can conclude that the given relation describes a function.

5 0

4 years ago

Read 2 more answers

Which expression is a perfect cube

mamaluj [8]

Answer: some perfect cubes are

8 (2^3)

27 (3^3)

64 (4^3)

there are many perfect cubes

maybe there is more to this question?

Step-by-step explanation:

A perfect cube of a number is a number that is equal to the number, multiplied by itself, three times. If x is a perfect cube of y, then x = y3. Therefore, if we take the cube root of a perfect cube, we get a natural number and not a fraction. Hence, 3√x = y. For example, 8 is a perfect cube because 3√8 = 2.

6 0

2 years ago