All categories

2 years ago

Does anyone know this (-13w^2+13)-(-2w^2) Plato answer

Mathematics

1 answer:

zimovet [89]2 years ago

3 0

Answer:

-11w^2+13

Step-by-step explanation:

(-13w^2+13)-(-2w^2)

Distribute the minus sign

-13w^2+13+2w^2

Combine like terms

-13w^2+2w^2+13

-11w^2+13

You might be interested in

Suppose it takes 2 1/2 h to drive from your house to the lake at 48 mi/h. How long will your return trip take at 40 mi/h?

Y_Kistochka [10]

Answer

The distance from the house to the lake is (2.5 hr)*(48 mi/hr) = 120 miles. The rerurn trip would take (120 mi)/(40 mi/hr) = 3 hours. Distance equals rate times time, so the distance to the lake is 2 1/2 hours times 48 miles per hour.

I hope this helps

4 0

3 years ago

How do you convert the angle 11(pie)/12 from radians to degrees?

sergey [27]

Answer:

165°

Step-by-step explanation:

11π/12 * 180/π = 1980π/12π

Reduce & Cancel: 165°

4 0

3 years ago

An article is bought and sold with a profit of 25% of selling price.find the profit percent

Viefleur [7K]

Answer:33 1/3%

Step-by-step explanation:

7 0

2 years ago

A consumer survey indicates that the average household spendsμ= $185on groceries each week. The distribution of spending amounts

Vitek1552 [10]

Answer:

$P(X>200)=P(\frac{X-\mu}{\sigma}>\frac{200-\mu}{\sigma})=P(Z>\frac{200-185}{25})=P(Z>0.6)$

And we can find this probability using the complement rule and with the normal standard table or excel:

$P(Z>0.6)=1-P(z$

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 average household spent of a population, and for this case we know the distribution for X is given by:

$X \sim N(185,25)$

Where $\mu=185$ and $\sigma=25$

We are interested on this probability

$P(X>200)$

And the best way to solve this problem is using the normal standard distribution and the z score given by:

$z=\frac{x-\mu}{\sigma}$

If we apply this formula to our probability we got this:

$P(X>200)=P(\frac{X-\mu}{\sigma}>\frac{200-\mu}{\sigma})=P(Z>\frac{200-185}{25})=P(Z>0.6)$

And we can find this probability using the complement rule and with the normal standard table or excel:

$P(Z>0.6)=1-P(z$

7 0

3 years ago

A zoo had 12 large aquariums with fish. The number of fish in each aquarium is shown 37, 58, 62,36,42,71,56,58,69,66,47,68 what

SSSSS [86.1K]

Answer:

Step-by-step explanation:

First, we will define range.

The difference between the highest and lowest values in a data is called range. To find the range, first the highest and lowest values are found from data, then the lowest value is subtracted from the highest value.

In the above data,

Highest Value=71

Lowest Value=36

Range=Highest value-lowest value

=71-36

=35

6 0

3 years ago