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3 years ago

3. Which expression is equivalent to 0? A. O a+(-a) B.O a-(-a) C. (a)(-a) D.

Mathematics

1 answer:

garik1379 [7]3 years ago

5 0

A. a + ( - a)

Because it’s the same thing as: a - a

And if you plug in any value for example:
2 - 2 that would be 0

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soldier1979 [14.2K]

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3 years ago

Suppose about 900,000 people live in an area of 1,800 square miles. What is the best estimate for the population density?

alukav5142 [94]

Answer:

The Population Density is $500\ People/mi^2$ .

Step-by-step explanation:

Given,

Total number of People = 900,000

Total Land Area = 1800 sq. mi.

Solution,

For calculating the population density, we have to divide the total number of people by the area of the land.

This can be framed in equation form'

$Population\ Density=\frac{Total\ Number\ of\ People}{Land\ Area}$

Now putting the given values, we get;

$Population\ Density=\frac{900,000}{1800\ mi^2}=500\ People/mi^2$

Hence The Population Density is $500\ People/mi^2$ .

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2 years ago

Why is the table not a probability distribution table?

jeyben [28]

Using probability distribution concepts, the correct option is:

C. the sum of the probabilities is not 1.00

In a probability distribution, the sum of all probabilities has to be equals to 1.

In this problem, the probabilities are: 0.25, 0.45, 0, 0.35.

Their sum is:

$0.25 + 0.45 + 0 + 0.35 = 1.05$

Since the sum is not 1, the correct option is:

C. the sum of the probabilities is not 1.00

For more on probability distribution concepts, you can check brainly.com/question/24802582

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2 years ago

Makes 12 cinnamon rolls needs to make 30

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Read 2 more answers

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Archy [21]

Step-by-step explanation:

total base length has to be found.

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2 years ago