All categories

3 years ago

Plz help if you know!!

Mathematics

1 answer:

Citrus2011 [14]3 years ago

6 0

Yes that is a function

Explanation: to figure out it’s a function draw vertical lines if one line goes through two lines then it’s not a function

You might be interested in

20 points.<br> Please answer and explain if possible.<br> Multiply.<br> -2y^2 * xy^4

Readme [11.4K]

When the bases are the same, you can combine the exponents.

x³ [x is where the base is]

For example:

x³ · y² = x³y² You can't simplify this anymore because they have different bases/variables

[when you multiply a variable with an exponent by a variable with an exponent, you add the exponents together] so:

x² · x³ = $x^{2+3}=x^5$

[when you multiply a variable with an exponent by an exponent, you multiply the exponents together] so:

(x³)²= $x^{3*2}=x^6$

$-2y^2*xy^4=-2x(y^{2+4})=-2xy^6$

4 0

4 years ago

Read 2 more answers

Which of the following is a logical conclusion based on the two statements below? If Jake forgets his snack, then he will be hun

ycow [4]

Answer:

I believe that the answer is either C or D

Step-by-step explanation:

Jake forgot his snack, which could mean that he was hungry at school. But it could be logical to assume that he forgot his breakfast. I may be wrong in both cases, but these are my best guesses!

4 0

3 years ago

Simplify. 3/(square root)-125n^12 -5 n9 -5 n4 5 n4

Alex17521 [72]

Answer:

B) $-5n^4$

Step-by-step explanation:

We want to simplify $\sqrt[3]{-125n^{12}}$

$\sqrt[3]{-125n^{12}} = \sqrt[3]{-1 * - 1 * -1 * 5 * 5 * 5 * n^4 * n^4 * n^4} \\\\= \sqrt[3]{(-1)^3 * 5^3 * (n^4)^3}\\\\= -1 * 5 * n^4\\\\= -5n^4$

The answer is $-5n^4$

7 0

3 years ago

17 is 25% of what number

Angelina_Jolie [31]

Answer:

17 is 25% of 68

Step-by-step explanation:

3 0

4 years ago

(1 point) The cost of unleaded gasoline once followed an unknown distribution with a mean of $4.59 and a standard deviation of $

marin [14]

Answer:

a) unknown

b) 1.43% probability that the average price for 30 gas stations is less than $4.55.

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore 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 pvalue, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this problem, we have that:

$\mu = 4.59, \sigma = 0.1$

a) What's the approximate probability that the average price for 16 gas stations is over $4.69?

Sample size less than 30 and unknow distribution. Therefore, the central limit theorem cannot be applied and the answer is unknown.

b) Find the probability that the average price for 30 gas stations is less than $4.55.

Now $n = 30, s = \frac{0.1}{\sqrt{30}} = 0.0183$

This probability is the pvalue of Z when X = 4.55. So

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

By the Central Limit Theorem

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

$Z = \frac{4.55 - 4.59}{0.0183}$

$Z = -2.19$

$Z = -2.19$ has a pvalue of 0.0143

1.43% probability that the average price for 30 gas stations is less than $4.55.

5 0

4 years ago