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3 years ago

The following statements are about finding a midpoint of a segment in the complex plane. Which statement is false?

Mathematics

1 answer:

n200080 [17]3 years ago

7 0

Answer:

Step-by-step explanation:

First subtract the endpoints and then divide by 2.

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Evaluate each expression if r= −3, s=4, and t= −7.

saul85 [17]

Answer:

a. $5$

b. $-1$

c. $132$

Step-by-step explanation:

Given:

$r =-3$ , $s = 4$ and $r = -7$

$\sqrt{s} +|r| \\ \sqrt{4} +|-3| \\ 2 +3 \\ 5$

$\frac{s -r}{t} \\ \frac{4 -(-3)}{-7} \\ \frac{4 +3}{-7} \\ \frac{7}{-7} \\ -1$

$2s^3 +r -t \\ 2(4)^3 +(-3) -(-7) \\ 2(64) -3 +7 \\ 128 -3 +7 \\ 132$

5 0

2 years ago

The area of the regular pentagon is 6.9 cm2. What is the perimeter? 2 cm 5 cm 10 cm 20 cm

disa [49]

Given

Area of the regular pentagon is 6.9 cm².

Find out the perimeter of a regular pentagon

To proof

Formula

Area of regular pentagon is

$= \frac{1}{4}\sqrt{5(5+2\sqrt{5})}\ a^{2}$

As given in the question

area of regular pentagon = 6.9 cm²

now equating the area value with the area formula.

$6.9 =\frac{1}{4}\sqrt{5(5+2\sqrt{5})} a^{2}$

Now put

√5 = 2.24 ( approx)

put in the above equation

$\frac{6.9\times 4}{\sqrt{5(5+2\times2.24)}}=a^{2}\\\frac{27.6}{\sqrt{47.4}}=a^{2}\\\frac{27.6}{6.88}=a^{2}$

thus

a² = 4.01

a = √ 4.01

a = 2.0 cm ( approx)

As perimeter represented the sum of all sides.

i.e regular pentagon have five sides of equal length.

Thus

perimeter of the regular pentagon = 5 × side length

= 5 ×2.00

therefore the perimeter of the regular pentagon = 10cm

option c is correct

Hence proved

3 0

3 years ago

Read 2 more answers

How do the 8 differ in 38108

kvasek [131]

The left 8 represents 8000 units.
The right 8 represents 8 units.

Their placement in the number is used to signify the multiplier for the number of units they represent. That is why the number system is called a "place value number system." Each time the digit is moved left one place, its value increases by a factor of 10.

3 0

3 years ago

Pythagorean Theorem please help

I am Lyosha [343]

2^2+b^2=12^2
4+b^2=144
144-4=140
√140 = √b
11.83 = b

7 0

3 years ago

Read 2 more answers

does anyone know how to solve this? i dont remember doing any problems in class related to this and this single question alone h

Serggg [28]

Answer:

The answer to your question is below

Step-by-step explanation:

Process

1.- Get two points of each line to find the equation of each line

Continuous line A (-10, 0) B (0, 9)

Dotted line C (-2, -3) D (0, -10)

Slope continuous line m = $\frac{9 - 0}{0 + 10} = = \frac{9}{10}$

Slope dotted line m = $\frac{-10 + 3}{0 + 2} = \frac{-7}{2}$

2.- Get the equation of each line

Continuous line y + 0 = 9/10 (x + 10)

y = 9/10x + 9

Dotted line y + 3 = -7/2(x + 2)

y + 3 = -7/2x - 7

y = -7/2x -7 - 3

y = -7/2x - 10

3.- Find the inequalities

<u> Continuous line</u> (we need the upper area of the line, we use ≥)

y ≥ 9/10x + 9

The <u>Dotted line</u> (we also need the upper area, we use >)

y > -7/2x - 10

6 0

3 years ago

Read 2 more answers