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Evgesh-ka [11]
3 years ago
12

Determine which expressions represent real numbers and which expressions represent complex numbers.

Mathematics
1 answer:
AysviL [449]3 years ago
6 0

There seems to be a mistake in typing. You probably type the letter "i" as "1", so it is difficult to tell which numbers are complex numbers.

I will however explain what complex numbers look like, which will help you in determining which numbers are complex numbers, and the rest are real numbers.

Step-by-step explanation:

Complex numbers are numbers that include the square root of a negative number.

It is not possible to have a value for an expression with a square root of a negative number, then the letter j or i were introduced to help represent these kinds numbers.

√-1 = i or j (anyone is fine)

Knowing the square root of -1 is i, we can write the square root of any negative number with ease.

√(-6) = √(-1) × √6, right?

= i × √6

= i√6

And so on.

So, basically, the numbers that include the letter 'i', or √(-1) in them are the complex numbers. The rest are real numbers.

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Three salesmen work for the same company, selling the same product. And, although they are all paid on a weekly basis, each sale
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Answer:

12 sales

Step-by-step explanation:

Let x represent the number of sales each man had.

For Salesman A, he earns $65 per sale; this is 65x.

For Salesman B, he earns $40 per sale; this is 40x.  We also add to this his weekly salary of $300; this gives us 40x+300.

Since their pay was equal, set the two expressions equal:

65x = 40x+300

Subtract 40x from each side:

65x-40x = 40x+300-40x

25x = 300

Divide both sides by 25:

25x/25 = 300/25

x = 12

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3 years ago
Seven friends went out to lunch. The meal subtotal was $91.22, including tax. The restaurant has a policy that for parties of si
vlada-n [284]

Answer:

$ 74.80

Step-by-step explanation:

The subtotal cost of the meal was $91.22  including tax.

The 18% tip is added for six or more.

The tip added should reduce the meal subtotal by 18 %

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82/100 * 91.22 = $ 74.80

7 0
3 years ago
Yes this is apparently a math equation. Fake answers will be deleted
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Step-by-step explanation:

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Read 2 more answers
Divide to find two equivalent fraction 4/12
SCORPION-xisa [38]

Answer: 2/6 and 1/3

Step-by-step explanation: Equivalent fractions are fractions that have the same value but have different top and bottom numbers.

We can find 1 equivalent fraction by dividing the numerator and the denominator by 2 and we get 2/6. We can also reduce 2/6 by dividing the numerator and the denominator by 2 and we get 1/3.

So two equivalent fractions for 4/12 would be 2/6 and 1/3.

4 0
4 years ago
What is the approximate distance from Denver to Chicago? Use a proportional relationship to solve the problem. Show your work.
Juli2301 [7.4K]

Answer:

d = 1002.6\,mi

Step-by-step explanation:

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4 years ago
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