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3 years ago

Show that f(2-3i) is a real number

Mathematics

1 answer:

densk [106]3 years ago

7 0

Answer:

2 - 3i

is 2 - the square root of -9

2 -√-9

2 + √9

2 + 3 = 5

Thank you (I dont know if these answers are 100% correct but I tried my best!)

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Masja [62]

August 8 is Day 15 and falls under the 1% discount rule.

750/0.99 = 757.58 from the balance, and 1400.00 - 757.58 = 642.42 is due by day 60.

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3 years ago

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El opuesto y el semejante de 8xy

kolezko [41]

Answer:

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Step-by-step explanation:

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3 years ago

Please help it’s urgent! it’s tangent lines

sleet_krkn [62]

The answer should be 24, because you can mark out 5,and 10 cuz it doesn’t make since

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2 years ago

Kabul’s bookshop marks up all books by 40 percent of their cost. The overhead rate is 16 percent of the selling price. What is t

morpeh [17]

Answer:

The net profit rate on the book is 5.41

Step-by-step explanation:

Given as :

The marks up percentage of book = m = 40%

The overhead rate is 16% of selling price

The cost price of book = c.p = $18.10

Let The profit = $p

Let The selling price = s.p

Now, According to question

mark up percentage = $\dfrac{s.p - c.p}{c.p}$

I.e 40% = $\dfrac{s.p - 18.10}{18.10}$

Or, $\dfrac{40}{100}$ + 1 = $\dfrac{s.p}{18.10}$

Or, $\dfrac{140}{100}$ = $\dfrac{s.p}{18.10}$

Or, s. p = $\dfrac{140\times 18.10}{100}$

∴ s.p = $25.34

So, selling price of book = s.p = $25.34

Now, The overhead percentage = 16%

i.e overhead rate = $\dfrac{\textrm estimated cost}{\textrm estimated total base unit}$

Or, estimated cost = 16% × 25.34

I,e estimated cost = 0.16 × 25.34

∴ estimated cost = $4.05

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Profit = selling price of book - estimated book cost

I.e p = $25.34 - $4.05

∴ p = $21.29

So, The profit rate% = $\dfrac{\textrm profit}{\textrm estimated cost}$

I.e The profit rate% = $\dfrac{21.29}{4.05}$

∴ profit rate %= 5.41

So, The profit rate = p = 5.41

Hence, The net profit rate on the book is 5.41 Answer

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3 years ago

Find the area of the rhombus. A= square units

Olin [163]

The answer should be 24 square units.

5 is the hypotenuse and the one we need is the base and the height. They gave us the height, which was 6 in total but 3 for the triangle. But we needed to find the base.

In order to do that, we need to use the Pythagorean Theorem.

a^2+b^2=c^2

3^2+b^2=5^2

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Subtract 9 from both sides

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Then square root both sides.

b=4.

Now that we have the base, you can then find the area of the triangle.

BH/2
4*3/2
12/2
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So one triangle equals to 6. Then multiply that by 4 to find the area of the rhombus. Which would be 24 square units.

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3 years ago