I REALLY NEED HELP

1 answer:

7 0

Start by dividing both sides by -3..

-3 | x + 7| = - 12

| x + 7 | = 4 or | x + 7 | = - 4

Take out the absolute value bars

x + 7 = 4 x + 7 = -4
-7 -7 - 7 -7

x = -3 or x = -11

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A retailer buys TV's fro $175 and marks them up 225%, what is the new cost

jonny [76]

Answer:

$568.75

Step-by-step explanation:

To find the markup, we multiply the original price by the percentage of markup

Markup = 175 * 225%

=175 * 2.25

=393.75

The new price is the markup plus the original price

New price = markup+ original price

=393.7+175

=568.75

3 0

3 years ago

What is 20/2(5*5) equal

otez555 [7]

Here's what I did:

20/2(5*5)=

20/2(25)=

(20*25)/2=

500/2=

250

There u go

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3 years ago

Data for a particular subdivision near downtown Houston indicate that the average price per square foot for a home is $100 with

spayn [35]

Answer:

$P(X>110)=P(\frac{X-\mu}{\sigma}>\frac{110-\mu}{\sigma})=P(Z>\frac{110-100}{5})=P(z>2)$

And we can find this probability with the complement rule and we got:

$P(Z>2) = 1-P(Z$

And using the normal standard table or excel we got:

$P(Z>2) = 1-P(Z$

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 random variable that represent the prices of a population, and for this case we know the distribution for X is given by:

$X \sim N(100,5)$