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2 years ago

Determine which of the following is a rectangle form of a complex number.

Mathematics

1 answer:

Varvara68 [4.7K]2 years ago

4 0

Answer:

A) a+bi

Explanation:

Rectangular form of complex numbers is written as a+bi, where a and b are integers.

Rectangular form always has an integer piece, a, and a complex piece, bi.

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20 friends compared the number of text messages they sent in a day. The results are represented in the table below:

pishuonlain [190]

Answer:

Step-by-step explanation:

Add up all the numbers in the frequency table then whatever your mean average is divide that by 5 because there are 5 numbers.

2+4+5+8+1

20/5=4

6 0

7 months ago

How to evaluate and simplify <br>

Kobotan [32]

Answer:

depends.

Step-by-step explanation:

Evaluating a question depends on the question given. To simplify an answer, you need to find the simplest answer, this process also depends on what question you're given, for example, if you simplify 4/8 (four eighths), it would be 1/2 (one half).

6 0

2 years ago

An airliner maintaining a constant elevation of 2 miles passes over an airport at noon traveling 500 mi/hr due west. At 1:00 PM,

butalik [34]

Answer:

$\frac{ds}{dt}\approx 743.303\,\frac{mi}{h}$

Step-by-step explanation:

Let suppose that airliners travel at constant speed. The equations for travelled distance of each airplane with respect to origin are respectively:

First airplane

$r_{A} = 500\,\frac{mi}{h}\cdot t\\r_{B} = 550\,\frac{mi}{h}\cdot t$

Where t is the time measured in hours.

Since north and west are perpendicular to each other, the staight distance between airliners can modelled by means of the Pythagorean Theorem:

$s=\sqrt{r_{A}^{2}+r_{B}^{2}}$

Rate of change of such distance can be found by the deriving the expression in terms of time:

$\frac{ds}{dt}=\frac{r_{A}\cdot \frac{dr_{A}}{dt}+r_{B}\cdot \frac{dr_{B}}{dt}}{\sqrt{r_{A}^{2}+r_{B}^{2}} }$

Where $\frac{dr_{A}}{dt} = 500\,\frac{mi}{h}$ and $\frac{dr_{B}}{dt} = 550\,\frac{mi}{h}$ , respectively. Distances of each airliner at 2:30 PM are:

$r_{A}= (500\,\frac{mi}{h})\cdot (1.5\,h)\\r_{A} = 750\,mi$

$r_{B}=(550\,\frac{mi}{h} )\cdot (1.5\,h)\\r_{B} = 825\,mi$

The rate of change is:

$\frac{ds}{dt}=\frac{(750\,mi)\cdot (500\,\frac{mi}{h} )+(825\,mi)\cdot(550\,\frac{mi}{h})}{\sqrt{(750\,mi)^{2}+(825\,mi)^{2}} }$

$\frac{ds}{dt}\approx 743.303\,\frac{mi}{h}$

6 0

2 years ago

Explain why the decimal moving strategy can be used with SI units but not with imperial units

jeka57 [31]

Because the SI units are based on the power of 10 but the imperial units are not

6 0

2 years ago

If 4x = 28 then x = 7

Contact [7]

Answer:

correct

Step-by-step explanation:

4 times 7 is 28

6 0

2 years ago

Read 2 more answers