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2 years ago

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Mary Lou buys a package of 500 heels to decorate 4 different pairs of jeans. She uses the same number of jewels on each pair of

jeans. How many jewels will she uses for each pair of jeans?

1 answer:

jeka57 [31]2 years ago

4 0

You just want to do 500/4=125 jewels on each pair of jeans

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On a coordinate plane, 2 exponential fuctions are shown. Function f (x) decreases from quadrant 2 into quadrant 1 and approaches

Gala2k [10]

Answer:

$g(x)=6(3)^x$

Step-by-step explanation:

We are given that

$f(x)=6(\frac{1}{3})^x$

Function f decreases from quadrant 2 to quadrant 1 and approaches y=0

It cut the y- axis at (0,6) and passing through the point (1,2).

Function g(x) approaches y=0 in quadrant 2 and increases into quadrant 1.

It passing through the point (-1,2) and cut the y-axis at point (0,6).

Reflection across y- axis:

Rule of transformation is given by

$(x,y)\rightarrow (-x,y)$

Using the rule then we get

$g(x)=6(\frac{1}{3})^{-x}=6(3)^x$

By using

$x^{-a}=\frac{1}{x^a}$

Substitute x=-1

$g(-1)=6\times (\frac{1}{3})=2$

Substitute x=0

$g(0)=6$

Therefore, $g(x)=6(3)^x$ is true.

8 0

2 years ago

Read 2 more answers

Suppose that on a certain examination in advanced mathematics, students from univer sity A achieve scores that are normally dist

harkovskaia [24]

Answer:

$P(z>-1.768)=1-P(z$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the scores for the univerisity A, and we know that:

$X \sim N (\mu = 625,\sigma =\sqrt{100}= 10)$

Let Y the scores for the univerisity B, and we know that:

$Y \sim N (\mu = 600,\sigma =\sqrt{150}= 12.25)$

We select a sample size of size n=2, and since the distirbution for X is normal then the distribution for the sample mean would be given by:

$\bar X \sim N(\mu=625, \frac{\sigma}{\sqrt{n}}=\frac{10}{\sqrt{2}}=7.07)$

And for the univeristy B we select a sample of n=3

$\bar Y \sim N(\mu=600, \frac{\sigma}{\sqrt{n}}=\frac{12.25}{\sqrt{3}}=7.07)$

Since both sample means are normally distributed then the difference $Z= \bar X- \bar Y$ is also normal distributed with the following parameters:

$Z= \bar X -\bar Y \sim N(\mu_Z=625-600=25, \sigma_z= \sqrt{100+100}=14.14)$

And we want this probability:

$P(Z>0)$

And we can use the z score given by:

$Z= \frac{z -\mu_z}{\sigma_z}$

And if we replace we got :

$Z= \frac{0-25}{14.14}=-1.768$

And if we find the probability using the normla standard table or excel we got:

$P(z>1.768) =1-P(Z$

3 0

2 years ago

Ying Ying wants to buy some petunias.

Crazy boy [7]

2 petunias leave $6.50 on her wallet, and 8 leave $5.00. This means that 6 petunias cost $1.50, and that 1 petunia costs 25 cents.

.25 goes into 3.50 (the amount of money she has left in her wallet after buying 14 petunias) 14 times. 14 + 14 =28.

Ying Ying can buy 28 petunias at most.

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2 years ago

A tank holds 17 3/5 gallons after losing 36 2/3 gallons, 4 5/6 gallons,and 27 1/12 gallons in 3

Rina8888 [55]

Answer:Maybe if you studded you would have the answer young man

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

The elevations of three cities in the Netherlands are shown below. Which comparison is true?

Lilit [14]

The correct answer is "Amsterdam is the same distance from sea level as Drachten." Each is two meters from sea level; Amsterdam is 2 meters under, Drachten two meters over.

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2 years ago