In how many ways can five people sit next to each other in a theater row

Answer:

see explanation

Step-by-step explanation:

We require to rationalise the denominator by multiplying the numerator and denominator by the complex conjugate of the denominator.

The conjugate of 5 + 3i is 5 - 3i

noting that i² = - 1, hence

[tex]\frac{(9-6i)(5-3i)}{(5+3i)(5-3i)}[/tex] ← expand factors

= [tex]\frac{45-57i+18i^2}{25-9i^2}[/tex]

= [tex]\frac{45-57i-18}{25+9}[/tex]

= [tex]\frac{27-57i}{34}[/tex]

= [tex]\frac{27}{34}[/tex] - [tex]\frac{57}{34}[/tex] i ← quotient

Final answer:

To find the quotient of 9-6i and 5+3i, multiply both the numerator and the denominator by the conjugate of the denominator 5-3i. Simplify by using the distributive property and knowing that i^2 equals -1. The final quotient is 27/34 - 57i/34.

Explanation:

To find the quotient of the complex numbers 9-6i divided by 5+3i, we must multiply the numerator and the denominator by the conjugate of the denominator. The conjugate of 5+3i is 5-3i. So, the process is as follows:

Thus, the quotient is 27/34 - 57i/34 or approximately 0.7941 - 1.6765i.

Answer:

19 t-shirts

Step-by-step explanation:

x= number of t-shirts

6x+54=168; now subtract 54 from both sides of the equation

6x=114; now divide both sides by 6 to isolate the "x"

x=19

Answer:

x=8

Step-by-step explanation:

(x+4) = (x+8)

------     -------

3            4

Multiply each side by 12 to get rid of the fraction

      (x+4) = (x+8)

12 *------     ------- *12

       3            4

4*(x+4) = (x+8)*3

Distribute

​4x+16 = 3x+24

Subtract 3x from each side

4x-3x+16 = 3x-3x+24

x+16 = 24

Subtract 16 from each side

x+16-16 = 24-16

x = 8

Answer:

[tex]x=\frac{5 \pm \sqrt{97}}{12}[/tex]

Step-by-step explanation:

First step is to arrange so it is in the form [tex]ax^2+bx+c=0[/tex].

We have [tex]5x=6x^2-3[/tex].

Add we really need to do is subtract 5x on both sides:

[tex]0=6x^2-5x-3[/tex].

Now let's compare [tex]6x^2-5x-3[/tex] to [tex]ax^2+bx+c[/tex].

We have [tex]a=6,b=-5,c=-3[/tex].

The quadratic formula is [tex]x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}[/tex].

I like to break this into parts:

Part 1:  Find [tex]-b[/tex].

Part 2: Find [tex]b^2-4ac[/tex].

Part 3: Find [tex]2a[/tex].

Answering the parts:

Part 1: [tex]-b=5[/tex] since [tex]b=-5[/tex].

Part 2: [tex]b^2-4ac=(-5)^2-4(6)(-3)=25-24(-3)=25+72=97[/tex].

Part 3: [tex]2a=2(6)=12[/tex].

Now our formula in terms of my parts looks like this:

[tex]x=\frac{\text{Part 1} \pm \sqrt{Part 2}}{Part 3}[/tex]

Our formula with my parts evaluated looks like this:

[tex]x=\frac{5 \pm \sqrt{97}}{12}[/tex].

Answer:

The median is 11.

Step-by-step explanation:

First arrange the data in ascending order:

4, 5, 5, 8, 9 , 10, 10, 10, 12, 14, 15, 16, 16, 18, 19, 21

There are 16 numbers so the median is the mean of the middle 2 numbers in the list. That is the  mean of the 8th and ninth number.

Median = 10 + 12 / 2

= 11.

Answer:

answer is 12 ape x

Step-by-step explanation:

i am not sure why tho to be honest if a verified answer is 11

Answer:

[tex]l=\frac{P}{2}-w[/tex].

Step-by-step explanation:

The perimeter of a rectangle is the sum of it's side lengths.

A rectangle has 4 sides where it's opposite sides are congruent.

So if one side has measurement w, then there is another side that has measurement w.

If there is one side that has measurement l, then there is another side that has measurement l.

So if you add w+w+l+l you get 2w+2l.

They are giving us that the perimeter is P, so P=2w+2l.

we are being asking to solve for l.

P=2w+2l

First step: Isolate term that contains the l, so get 2l by itself first.

We are going to subtract 2w on both sides giving us:

P-2w=2l

2l=P-2w

Now that we have 2l by itself it is time to perform the last step in getting l by itself.

Second step: Divide both sides by 2.

This gives us:

l=(P-2w)/2

You may separate the fraction like so:

[tex]l=\frac{P-2w}{2}=\frac{P}{2}-\frac{2w}{2}=\frac{P}{2}-w[/tex].

I don't know your options but I have solve for l in terms of P and w

and got [tex]l=\frac{P}{2}-w[/tex].

Please let me know if you have further questions with this problem.

Answer:

8*6 + 12*h ≥144

Step-by-step explanation:

8 dollars at the movie theater

12 dollars at the restaurant

scheduled 6 hours at the movie theater

need to make at least 144 dollars

The money he makes is the hours times the rate

rate * hours at movie theater + rate *hours at restaurant

This must be greater than or equal to 144

Let h be the hours at the movie theater

8*6 + 12*h ≥144

Answer: Step 3

Step-by-step explanation:

He should have divided 8 by 2 and then added it to 49.

In the third step, Rahul made his first mistake. Simplification is to be done using the BODMAS rule.

Making anything easier to accomplish or comprehend, as well as making it less difficult, is the definition of simplification.

Rahul simplified an expression. His work is shown below.

The expression is given below.

7 (8.5 - 1.5) + 8 / 2

Step 1. 7 (7) + 8 / 2

Step 2. 49 + 8 / 2

Step 3. 49 + 4

Step 4. 53

In the third step, Rahul made his first mistake.

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Answer:

See below.

Step-by-step explanation:

It decreases in the interval where x  > -2.

In interval notation this is (-2, ∞).

The quadratic function decreasing at x>-2.

A quadratic polynomial is a polynomial of degree two in one or more variables.

Given is a graph,

It decreases in the interval where x  > -2.

In interval notation, this is (-2, ∞).

Hence, the quadratic function decreasing at x>-2.

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The full length of one line times the length of the line outside the circle is equal the the other line.

(7+x)*7 = (13 +8) * 8

Simplify:

7x +49 = 21 * 8

7x +49 = 168

Subtract 49 from each side:

7x = 119

Divide both sides by 7:

x = 17

The answer is B. 17

The value of x for the given circle will be 17 so option (B) will be correct.

A circle is a geometrical figure which becomes by plotting a point around a fixed point by keeping a constant distance.

In our daily life, we always see circle objects for example our bike wheel.

The longest line which can be drawn inside the circle will be the diameter.

Area of circle = πr² and the perimeter of circle = 2πr where r is the radius of the circle.

By theorem in circle

( 13 + 8) × 8 = ( x + 7) × 7

21 × 8 =  ( x + 7) × 7

x + 7 = 3 × 8

x = 24 - 7

x = 17

Hence, The value of x for the given circle will be 17.

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Answer:

C

Step-by-step explanation:

The equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

y - 5 =  - 3(x + 2) ← is in point- slope form

with slope m = - 3

Given a line with slope m then the slope of a line perpendicular to it is

[tex]m_{perpendicular}[/tex] = - [tex]\frac{1}{m}[/tex] = - [tex]\frac{1}{-3}[/tex] = [tex]\frac{1}{3}[/tex]

and (a, b) = (6, - 1), hence

y - (- 1) = [tex]\frac{1}{3}[/tex](x - 6), that is

y + 1 = [tex]\frac{1}{3}[/tex](x - 6) → C

Answer:

y = 3

Step-by-step explanation:

The y-coordinate of all points on the graph is 3.

The equation is y = 3

Answer:

y = 3

Step-by-step explanation:

The equation of a horizontal line parallel to the x- axis is

y = c

Where c is the value of the y- coordinates the line passes through.

In this case the line passes through points with a y- coordinate of 3, hence

Equation of horizontal line is y = 3

Answer:

140°

Step-by-step explanation:

<3 = 40 because they are vertical angles

<3 +<4 = 180 because they are same side interior angles

40 + <4 = 180

Subtract 40 from each side

40-40 + <4 = 180-40

<4 = 140

Answer:

[tex]A=76.44\ units^{2}[/tex]

Step-by-step explanation:

To find the approximate area of the circle, calculate the area of one sector and then multiply by 16

Remember that

The area of a triangle (one sector) is equal to

[tex]A=\frac{1}{2}(b)(h)[/tex]

therefore

The approximate area of the circle is equal to

[tex]A=(16)\frac{1}{2}(1.95)(4.9)[/tex]

[tex]A=76.44\ units^{2}[/tex]

Answer:

D.76.44 square units

Step-by-step explanation:

We are given that

Base of one sector=b=1.95 units

Height of sector=h=4.9 units

Total number of sectors=16

Area of one sector is equal to area of triangle (approximately)

Area of sector=[tex]\frac{1}{2}bh[/tex]

Using the formula

Area of one sector=[tex]\frac{1}{2}(1.95)(4.9)=4.7775[/tex] square units

Area of circle A=[tex]16\times [/tex]area of sector

Area of circle A=[tex]16\times 4.7775=76.44[/tex] square units

Hence,option D is true.

Answer:

Murray can swim 3/4 km downstream

Step-by-step explanation:

Since the current adds to his speed and

then subtracts the same amount, you can

disregard the current

d=r*t

Convert 15 min to hrs ( time to swim downstream )

15(1/60)=1/4 hours

d=3(1/4)

d=3/4 km downstream.

Hence Murray can swim 3/4 km downstream....

Final answer:

Murray swam 0.417 km downstream before turning around and swimming back upstream. The calculation involves solving a simple algebraic equation using Murray's swimming speed and the river's flow rate, within the total time frame of 30 minutes.

Explanation:

The student is asking about a problem involving rates and time, which is a common topic in algebra and physics. In this scenario, Murray is able to swim at a speed of 3 km/h in still water, and the river flow adds an extra 2 km/h when swimming downstream, making his effective downstream speed 5 km/h. When swimming upstream, Murray has to work against the river flow, reducing his effective speed to 1 km/h (3 km/h - 2 km/h). Given that the total time spent swimming is 30 minutes (0.5 hours), we need to determine the distance Murray swam downstream before turning back.

Let the distance Murray swam downstream be d kilometers. The time to swim downstream at 5 km/h is d/5 hours, and the time to swim back upstream at 1 km/h is d hours. The sum of these times equals the total time Murray was swimming:

d/5 + d = 0.5

By solving the equation, we find that d = 0.417 km. Therefore, Murray swam 0.417 kilometers downstream before turning around and swimming back upstream.

Answer:

x = 3 and x = 7

Step-by-step explanation:

Equate the product of the factors to zero, that is

(x - 3)(x - 7) = 0

Equate each factor to zero and solve for x

x - 3 = 0 ⇒ x = 3

x - 7 = 0 ⇒ x = 7

Final answer:

To find the values of x that make a polynomial equal to zero, set each factor equal to zero and solve for x. The values of x that would make the polynomial equal to zero are x = 3, and x = 7.

Explanation:

To find the values of x that make a polynomial equal to zero, you need to set each factor equal to zero and solve for x.

Set x-3=0 and solve for x to get x=3.

Set x-7=0 and solve for x to get x=7.

Therefore, the values of x that would make the polynomial equal to zero are x = 3 and x = 7.

[tex]x^3-3x^2+81x-243=\\x^2(x-3)+81(x-3)=\\(x^2+81)(x-3)=\\(x-3)(x-9i)(x+9i)[/tex]

Answer:

D:456.2 units²

Step-by-step explanation:

Step 1: Area of all 4 sides of cuboid

Area of rectangle = 4 x length x breadth

Area of rectangle = 4 x 10 x 5

Area of rectangle = 200

Step 2: Calculate bottom of cuboid

Area = length x breadth

Area = 10 x 10

Area = 100

Step 3: Calculate slant height of pyramid

c² = a² + b²

c² is hypotenuse

a² is the base which is half of w (10/2 = 5)

b² is y which is 6

c² = a² + b²

c² = 5² + 6²

c = √61

Step 4: Calculate area of one face of the pyramid

Area of triangle = 1/2 x base x height

Area of triangle = 1/2 x 10 x √61

Area of triangle = 5√61

Step 5: Calculate areas of all 4 faces of the pyramid

4 x 5√61 = 20√61

Step 6: Calculate the total surface area

Total surface area = 200 + 100 + 20√61

Total surface area = 456.2

The surface area of the figure is 456.2 units²

Option D is correct.

!!

Answer:

The correct answer is C. 2.

Step-by-step explanation:

To solve this problem, we should begin with the second step and work backwards in order to find the unknown value.  If given the equation -15x + 30 = 25, we should factor out a -15 to simplify.  This method is shown below.

-15x + 30 = 25

-15(x-2) = 25

We know this is correct because if we redistribute the -15 through the parentheses using the distributive property, we would get our original equation again.  In other words, this answer is confirmed by the fact that -15 * -2 equals positive 30.

However, we need to look closely at the question that is asked.  The box that we must fill in is already preceded by a negative sign, thus the correct answer is C. 2.

We can check our work by replacing the box with the number 2, getting -15(x-2) + 30 = 25, which was the equation we got earlier.

Hope this helps!

Answer:



Thank Me later lol

Answer:

Step-by-step explanation:

Convert the given equation to the form y = mx + b:

[tex]-x+2y=11[/tex]          add x to both sides

[tex]2y=x+11[/tex]          divide both sides by 2

[tex]y=\dfrac{1}{2}x+\dfrac{11}{2}[/tex]

It's a linear function.

We need only two points to plot the graph. Select any two x values, insert into the equation and calculate y values.

for x = 1

[tex]y=\dfrac{1}{2}(1)+\dfrac{11}{2}=\dfrac{1}{2}+\dfrac{11}{2}=\dfrac{12}{2}=6\to(1,\ 6)[/tex]

for x = -5

[tex]y=\dfrac{1}{2}(-5)+\dfrac{11}{2}=-\dfrac{5}{2}+\dfrac{11}{2}=\dfrac{6}{2}=3\to(-5,\ 3)[/tex]

Answer: D

Step-by-step explanation:

They are rectangles when the sides are 90 degrees. :)

A rhombus is a rectangle when all its angles are right angles.

A rectangle is a plane figure with four straight sides and four right angles, especially one with unequal adjacent sides, in contrast to a square.

Given is a rhombus.

A rhombus is a rectangle when all its angles are right angles. Due to this, the tilt of the vertical sides of rhombus will become 0 degrees.

Therefore, a rhombus is a rectangle when all its angles are right angles.

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Answer:

if she would sell it for what it is worth now she would make $36.50

Step-by-step explanation:

0.75 x 83 = 62.5

62.5 + 8.75 = 71

71 is how much it is worth now

71 - 34.5 = 36.5

36.50 is how much she would make

Answer:

$36,50

Step-by-step explanation:

That is correct to me. You do those exact steps to arrive at that answer.

b) -4

- 8x +4 =36

First, we subtract 4 from 36 to get 32

36-4=32

-8x=32

Since a negative times a negative equals a positive, then the answer has to be negative because 36 is positive.

32 divided by 8 = 4

B) -4

Answer:

The answer is B, x=-4

Step-by-step explanation:

-8x + 4 = 36

-8x - 4 = 36 - 4

-8x = 32

-8x/-8 = 32/-8

x = -4

Answer: By phaythagores I think you mean pythagorean.

The Pythagorean theorem states that a^2+b^2=c^2. In a right angled triangle the square of the long side is equal to the sum of the squares of the other two sides.

Step-by-step explanation: Pythagoras was a greek philosopher and mathematician. He was often described as one of the purest mathematicians of his time. He had many followers and his teachings are still renowned today.The mystical Pythagoras was so excited by this discovery that he became convinced that the whole universe was based on numbers, and that the planets and stars moved according to mathematical equations!

Answer:

the madnes

Step-by-step explanation:

Answer:

Angle of elevation of the highest point of the mountain is 77°

Step-by-step explanation:

Lynne is hiking. When she stands at the base of the mountain, the horizontal distance between Lynne and the highest point of the mountain is 588 feet.

Elevation of the mountain is 2610 feet.

We have to calculate the angle of elevation ∠C.

tanC = [tex]\frac{2610}{588}[/tex]

tanC = 4.439

C = [tex]tan^{-1}(4.439)[/tex]

C = 77.30 ≈ 77°

Therefore, angle of elevation of the mountain is 77°

[tex]\huge\text{Hey there!}[/tex]

[tex]\huge\bold{{32 = [4(2 + 5) - 2\times6]}}[/tex]

[tex]\text{[4(2 + 5) - 2} \ \times \ 6][/tex]

[tex]\text{Do PEMDAS}\downarrow[/tex]

[tex]\huge\text{Parentheses}\\\huge\text{Exponents}\\\huge\text{Multiplication}[/tex] [tex]\huge\text{Division}\\\huge\text{Addition}\\\huge\text{Substraction}[/tex]

[tex]\huge\text{First, we do PARENTHESES}[/tex]

[tex]\huge\text{2 + 5 which equals 7}[/tex]

[tex]\huge\text{4(7) - 2(6)}[/tex]

[tex]\huge\text{Next step is multiplication since we don't have}[/tex] [tex]\huge\text{exponents}[/tex]

[tex]\huge\text{4(7) = 28}\\\\\huge{\text{2(6) = 12 }[/tex]

[tex]\huge\text{Thirdly, we have to do subtraction since}[/tex] [tex]\huge\text{we don't have have any division or addition}[/tex]

[tex]\huge\text{28 - 12 = 16}[/tex]

[tex]\boxed{\boxed{\huge\bf{Answer: 32\neq16\ so,\ it \ is \ FALSE}}}\checkmark[/tex]

[tex]\text{Good luck on your assignment and enjoy your day!}[/tex]

~[tex]\frak{LoveYourselfFirst:)}[/tex]

Answer:

So the other x-intercept we are looking for is (2.29 , 0).

Step-by-step explanation:

The equation for a parabola in vertex form is

[tex]y=a(x-h)^2+k[/tex] where (h,k) is the vertex.

So we are given (h,k)=(1,5) so let's plug that in.  This gives us the following equation for our parabola:

[tex]y=a(x-1)^2+5[/tex].

Now we need to find [tex]a[/tex]. Let's find [tex]a[/tex] by using another point (x,y) given.  We are given that (0,2) is on our parabola. So when x is 0, y is 2.

This gives us the equation:

[tex]2=a(0-1)^2+5[/tex]

[tex]2=a(-1)^2+5[/tex]

[tex]2=a(1)+5[/tex]

[tex]2=a+5[/tex]

[tex]2-5=a[/tex]

[tex]-3=a[/tex]

So our parabola in vertex form looks like this:

[tex]y=-3(x-1)^2+5[/tex]

Now we are asked to find the x-intercepts.

You can find the x-intercepts by setting y equal to 0 and solving for x.

So let's do that:

[tex]0=-3(x-1)^2+5[/tex]

Subtract 5 on both sides:

[tex]-5=-3(x-1)^2[/tex]

Divide both sides by -3:

[tex]\frac{5}{3}=(x-1)^2[/tex]

Take the square root of both sides:

[tex]\pm \sqrt{\frac{5}{3}}=x-1[/tex]

Add 1 on both sides:

[tex]\pm \sqrt{\frac{5}{3}}+1=x[/tex]

So the two solutions in exact form are

[tex]x=\sqrt{\frac{5}{3}}+1 \text{ or } -\sqrt{\frac{5}{3}}+1[/tex]

Putting both into calculator (separately) gives:

[tex]x \approx 2.29 \text{ or } -0.29[/tex]

So the other x-intercept we are looking for is (2.29 , 0).

Solutions are denoted by index. Most of the equations you listed has 2 solutions.

Number one cannot be factored using whole numbers.

Number two.

[tex]

4x^2+25=0\Longrightarrow(2x+5)(2x-5)=0 \\

x_1\Longleftrightarrow\boxed{2x+5=0\Longrightarrow x=-\dfrac{5}{2}} \\

x_2\Longleftrightarrow\boxed{2x-5=0\Longrightarrow x=\dfrac{5}{2}}

[/tex]

Number three.

[tex]

x^2+121=0\Longrightarrow(x+11)(x-11)=0 \\

x_1\Longleftrightarrow\boxed{x+11=0\Longrightarrow x=-11} \\

x_2\Longleftrightarrow\boxed{x-11=0\Longrightarrow x=11}

[/tex]

Hope this helps.

Check the picture for the correct answer:                                          

Answer:

x > -3

Step-by-step explanation:

We are given the following inequality that we are to solve:

[tex]3(x+2)>x[/tex]

Applying the distributive property of multiplication on the left side of the inequality to get:

[tex] 3 x + 6 > x [/tex]

Rearranging the inequality:

[tex] 3 x - x > - 6 [/tex]

[tex] 2 x > - 6 [/tex]

[tex] x > \frac { - 6 } { 2 } [/tex]

x > -3

Answer:

[tex]\large\boxed{x>-3\to\{x\ |\ x>-3\}\to x\in(-3,\ \infty)}[/tex]

Step-by-step explanation:

[tex]3(x+2)>x\qquad\text{use the distributive property:}\ a(b+c)=ab+ac\\\\(3)(x)+(3)(2)>x\\\\3x+6>x\qquad\text{subtract 6 from both sides}\\\\3x+6-6>x-6\\\\3x>x-6\qquad\text{subtract x from both sides}\\\\3x-x>x-x-6\\\\2x>-6\qquad\text{divide both sides by 2}\\\\\dfrac{2x}{2}>\dfrac{-6}{2}\\\\x>-3[/tex]

Answer:

y = - x + 3

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = x + 2 ← is in slope- intercept form

with slope m = 1

Given a line with slope m then the slope of a perpendicular line is

[tex]m_{perpendicular}[/tex] = - [tex]\frac{1}{m}[/tex] = - [tex]\frac{1}{1}[/tex] = - 1, hence

y = - x + c ← is the partial equation of the perpendicular line

To find c substitute (4, - 1) into the partial equation

- 1 = - 4 + c ⇒ c = - 1 + 4 = 3

y = - x + 3 ← equation of perpendicular line