Find the quotient. Write your answer in standard form. : 3-i/3+i

A. 1-i
B. 3/5 + 4/5 i
C. 4/5 - 3/5 i
D. -1

Answers

Answer 1
The answer is C. 4/5 - 3/5 i

[tex] \frac{3-i}{3+i} = \frac{(3-i)(3-i)}{(3+i)(3-i)} \\ \\ (a+b)(a-b) = a^{2} -b^{2} \\ \\ \frac{(3-i)(3-i)}{(3+i)(3-i)}= \frac{ (3-i)^{2} }{3^{2}-i^{2} } \\ \\ (a-b)^{2} =a^{2}-2ab+b^{2} \\ \\ \frac{ (3-i)^{2} }{3^{2}-i^{2} } = \frac{3^{2}-2*3*i+i^{2} }{3^{2}-i^{2} } = \frac{9-6i+i^{2}}{9-i^{2}} \\ \\ i = \sqrt{-1} \\ i^{2}=-1 \\ \\ \frac{9-6i+i^{2}}{9-i^{2}} = \frac{9-6i-1}{9+1} = \frac{8-6i}{10}= \frac{8}{10}- \frac{6i}{10}= \frac{4}{5}- \frac{3}{5}i [/tex]

Related Questions

How many days equals 7344 minutes??

Answers

It would be 5 days, 2 hours and 24 minutes.

Answer:

as a decimal: 5.1



The product of eight minus a number and seven equals forty when decreased by five. Which equation represents the sentence?

Answers

the "product" of two numbers means you multiply them.

So, you are multiplying (8-n), where n = "a number," by 7.

Then, when you decrease (subtract) this product by 5, you get 40.

So the whole thing looks like

7(8-n) - 5 = 40.

Jen is making a frame to stretch a canvas over for a painting. She nailed four pieces of wood together at what she believes will be the four vertices of a square. How can she be sure that the canvas will be a square?

a. All four of the pieces of wood are the same length & at least two interior angles are congruent.

b. At least two pieces of wood are the same length & at least two interior angles are congruent.

c. At least two pieces of wood are the same length & all four interior angles are congruent.

d. All four of the pieces of wood are the same length & all four interior angles are congruent.

Answers

According to the picture attached above, the only suitable option which I find to becorrect is the last one -d. All four of the pieces of wood are the same length & all four interior angles are congruent. I think so because all the sides have to be equal to each other and so that it shape will be square indeed.
Hope you will find it helpful!

if you found 259 to the nearest hundreds,what is the answer

Answers

it would be rounded up to 300.
this is because the number in the tens column is 5 or above therefore you round up.

hope this helps you

In the equation y = mx + b, b represents:



A. slope


B. rise


C. y - intercept


D. x - intercept

Answers

The answer to this is C. y - intercept

During the National Football League’s 1999 season, Troy Aikman, the quarterback for the Dallas Cowboys, earned $0.467 million more than Deion Sanders, the Cowboys cornerback. Together they cost the Cowboys $12.867 million. How much did each player make?

Answers

12,867,000 - 467000 / 2. Thats how you get your answer. The answer is 6200000.

Troy Aikman make 6667000 and Deion Sanders makes 6200000 for the Cowboys cornerback.

What is Equation?

Two or more expressions with an Equal sign is called as Equation.

Given,

Troy Aikman, the quarterback for the Dallas Cowboys, earned $0.467 million more than Deion Sanders

Let Deion Sanders earning is x.

Troy Aikman earning is x+467000

Together they cost the Cowboys $12.867 million

x+x+467000=12867000

2x+467000=12867000

Subtract 467000 on both sides

2x=12867000-467000

2x=12400000

Divide both sides by 2

x=6200000

So Troy Aikman make 6200000+467000=6667000 and

Deion Sanders makes 6200000

Hence Troy Aikman make 6667000 and Deion Sanders makes 6200000 for the Cowboys cornerback.

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1/3 and 7/9 rewrite using the least common denominator

Answers

3/9 and 7/9.

9 is the LCD. So you have to multiply 3 by 3 to get 9, so multiply the numerator (1) by 3. 3/9 is the answer to that. 
Final answer:

To rewrite 1/3 and 7/9 using the least common denominator, you need to find the smallest number that both 3 and 9 can divide evenly into. The least common denominator (LCD) of 3 and 9 is 9. Rewrite the fractions as 3/9 and 7/9, respectively.

Explanation:

To rewrite the fractions 1/3 and 7/9 using the least common denominator, we need to find the smallest number that both 3 and 9 can divide evenly into. The least common denominator (LCD) of 3 and 9 is 9. We can now rewrite the fractions:

1/3 becomes 3/9 (multiply the numerator and denominator by 3)7/9 remains the same

So, 1/3 and 7/9 can be rewritten as 3/9 and 7/9, respectively, using the least common denominator.

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Goran rented a truck for one day. there was a base fee of $15.99, and there was an additional charge of 96 cents for each mile driven. goran had to pay $288.63 when he returned the truck. for how many miles did he drive the truck?

Answers

288.63-15.99= 272.64
272.64÷0.96= 284 miles

break apart and distribute to solve 72÷8
72÷8=(40÷8)+(32÷8)
9=5+4
9=9

Answers

Answer:

72 ÷ 8 is equal to 9

Step-by-step explanation:

If we want to solve 72 ÷ 8 by breaking apart and distributing, the first step is to write the number ''72'' as the sum or subtraction of two numbers that are divisible by ''8''.

We can write :

[tex]72 = 40+32[/tex]

If we replace this last expression in the original one :

72 ÷ 8 = (40 + 32) ÷ 8 (II)

Now in (II) we can use the distributive property of the division :

(40 + 32) ÷ 8 = (40 ÷ 8) + (32 ÷ 8) (III)

Finally, we need to solve the expression (III) :

(40 ÷ 8) + (32 ÷ 8) = 5 + 4 = 9

We find that 72 ÷ 8 is 9 by breaking apart and then distributing.

What is the product of written in simplest form? 7/10 divided by 5/6

Answers

7/10 / 5/6
We can re-write it as:
7/10 * 6/5 = 42/50 = 21/25

So, your final answer is 21/25
7/10 / 5/6 = 7/10 • 6/5 7/10 * 6/5 = 42/50 42/50 simplified is 21/25

a scale model of a statue is 7 inches tall. The scale of the model is 1in./1.5ft. what is the actual height of the statue?

Answers

so first we would get the scale to the same units. So we would take 1in:1.5ft and convert the feet to inches. 1.5 x 12 = 18
So the scale of the model is 1:18
now just multiply 7 by 18 to get-
126 inches, or 10.5 feet

12x=4(x-5) then x equals?

Answers

12x=4(x-5)

distributive property to get rid of parenthesis     12x=4x-20

subtract x from one side to get the variable on one side       8x=-20

divide 8 by -20

x=-2.5
Simplifying 12x = 4(x + 5) Reorder the terms: 12x = 4(5 + x) 12x = (5 * 4 + x * 4) 12x = 

In a triangle ABC, with angles A, B, and C and sides AB, BC, and AC, angle B is a right (90°) angle. If the sin of angle A is 0.5 and side BC is 8 inches long, what is the length of side AC?

Answers

I hope this helps you

The area of a triangle is 25 sq cm and the base of the triangle is 5 cm. Which equation could be used to find the height of the triangle?
A.


B.


C.


D.

Answers

I hope this helps you





Area=base×height/2



25=5×height/2



5×2=height


height=10

A survey by the state health department found that the average person ate 208 pounds of vegetables last year and 125 5/8 pounds of fruit.What fraction of the total pounds of fruit and vegetables do the pounds of fruits represent?

Answers

Answer: The fraction of pounds of fruits over total pounds of fruits and vegetables is given by

[tex]\frac{25125}{66724}[/tex]

Step-by-step explanation:

Since we have given that

Total amount of vegetables = 208 pounds

Total amount of fruits is given by

[tex]125\frac{5}{8}\text{ pounds}[/tex]

Total amount of fruits and vegetables is given by

[tex]208+125\frac{5}{8}\\\\=208+\frac{1005}{8}\\\\=\frac{1664+1005}{8}\\\\=\frac{2669}{8}\\\\=333.625\text{ pounds }[/tex]

So, we need to find the fraction of pounds of fruits over the total pounds of fruit and vegetables :

[tex]\frac{\text{Pounds of fruits }}{\text{ total pounds of fruits and vegetables}}\\\\=\frac{\frac{1005}{8}}{333.62}\\\\=\frac{1005}{8\times 333.62}\\\\=\frac{1005}{2668.96}=\frac{25125}{66724}[/tex]

Final answer:

The fraction of the total pounds of fruit and vegetables that fruits represent is approximately 0.377, or 37.7%.

Explanation:

To find out what fraction the pounds of fruits represent out of the total pounds of fruits and vegetables, we first need to calculate the total pounds of fruits and vegetables consumed. This is found by adding the pounds of vegetables (208) to the pounds of fruits (125 5/8). So, 208 + 125 5/8 = 333 5/8 pounds.

Now, to determine the fraction, we take the pounds of fruits and divide by the total. Hence, the fraction is given by 125 5/8 ÷ 333 5/8. To divide fractions, we multiply by the reciprocal of the divisor, which gives us (125 5/8) * (8/333) = 0.377 (rounded to three decimal places).

Therefore, fruits represent approximately 0.377, or 37.7% of the total pounds of fruits and vegetables consumed.

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find (2 × 107) (3 × 104).

Answers

the answer will be 66768
(2 × 107) (3 × 104)
------------
(2 × 107) = 214

 (3 × 104) = 312
------------------------------
312 x 214
---------------------------
= 66768

What is the absolute value of 6?

Answers

The absolute value of 6 is 6.

Answer:

absolute value is 6

Which of the points shown below are on the line given by the equation y = 5x? Check all that apply.



A. Point A: (5, -1)

B. Point B: (1, 5)

C. Point C: (0, 0)

D. Point D: (-3, 2)

Answers

To figure out the answer, plug in you x and y values

The correct Options are  B and C.

What is Function of graph ?The collection of all points in the plane with the form (x, f(x)) that make up a function f's graph. We may alternatively say that the graph of f is the graph of y = f. (x). As a result, the graph of an equation is a particular instance of the graph of a function. Allow f(x) to equal x2 - 3.The graph is a function if a vertical line drawn across it is moved and only ever touches it at one point.

To solve y = 5x we check all options in equation by value putting.

let y = 5x .......................(1)

    Put point A ( 5, -1) in equation (1)

So,    x = 5 & y = -1

          y = 5x ⇒ -1 = 5 ×5= 25

  Put point B (1,5) in equation (1)

So,     x = 1 & y = 5

          y = 5x ⇒ 5 = 5 × 1 = 5

Put point C (0,0) in equation (1)

           x = 0 & y = 0    

                y = 5x ⇒ 0 = 5 × 0 =0

Put point D ( -3 ,2) in equation (1)

        x = -3 & y = 2

         y = 5x ⇒ 2 = -3× 2 = -6

In all these points ,  B & C points are have same value on both side.

So, we can say that b&c are the points which are shown on the line.

Therefore, The correct Options are  B and C.

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Mark is solving the following system.
x+y+z=2 (1)
3x+2y+z=8 (2)
4x-y-7z=16 (3)

Step 1: He multiplies equation (1) by 7 and adds it to equation (3).
Step 2: He multiplies equation (3) by 2 and adds it to equation (2).

Which statement explains Mark’s mistake?
- He added equation (3) instead of equation (2) in step 1.
- He did not multiply equation (3) by the correct value.
- He did not eliminate the same variables in steps 1 and 2.
- He added equation (3) and equation (2) instead of subtracting.

Answers

I think its he didnt eliminate the same variables

Solving the system of linear equations Mark tries to apply elementary transformations in order to eliminate one variable.

He makes such steps:

1. He multiplies equation (1) x+y+z=2 by 7 and adds it to equation (3) 4x-y-7z=16. This gives him:

7x+7y+7x+4x-y-7z=14+16,

11x+6y=30.

2. He multiplies equation (3)  4x-y-7z=16 by 2 and adds it to equation (2) 3x+2y+z=8. This step gives him:

8x-2y-14z+3x+2y+z=32+8,

11x-13z=40.

Thus, he did not eliminate the same variables in steps 1 and 2.

Answer: correct choice is C

Write the time 12 hours after 8 p.m. use an or pm

Answers

1)9pm
2)10pm
3)11pm
4)12am
5)1 am
6) 2 am
7) 3 am
8) 4 am
9)5 am
10) 6 am
11) 7 am
12) 8 am

If a road has a 4% grade and rises 200 feet, what is the run?

Answers

4% of the run is 200
as an equation 4%=0.04
0.04*run=200
so run=200/0.04
run=5000feet

Answer:

5000

Step-by-step explanation:

400 ÷ 4% = 5000

at her job, mary works 4 hours on monday, 3 hours on wednesday, and 6 hours on saturday. her boss adds a $10 bonus to her paycheck, which then totals $120.50. what is mary's hourly pay?

a. $8.50
b. $9.27
c. $5.24
d. $8.05

Answers

she worked 4+3+6 hours = 13 hoursso 13x+10 = 120.50
13x=110.50
x=8.5
so she makes $8.50 an hour which is A.

Question. I have some math problems that I really need help with and this is all new to me. The direction are as follows:
Combine like terms 7x4 -5x4 the number four is square root. I don't understand at all what to do. Please help.

Answers

I cant help u because I hate math xd

Answer:

-7 + x + 4 + 4x = x - 3 + 6 + 3x

Step-by-step explanation:

John has read the first 114 pages of a novel. He has read 3 pages less than one-third of the novel.
Write an equation to describe the total number of pages p in the novel, and find the value of p.

Answers

I hope this helps you



novels total page x



1/3x-3=114


1/3x=117


x=3.117


x=351
Read the text and write things you read one by one:
he says he read 1/3 of his novel. Let x represent number of pages of the novel.
1/3x is one third of that novel.

3 pages less than one third is:
1/3x - 3

and that represents 114 pages that he read.
now we make that equal to 114 and solve for x

1/3x - 3 = 114
1/3x = 114 + 3 = 117
x = 351

Answer is 351 pages

what is the equivalent ratio to 12:20

Answers

divide both sides by 4:
3:5

Two numbers are 10 units away in different directions from their midpoint, m, on a number line. The product of the numbers is –99.

Which equation can be used to find m, the midpoint of the two numbers?

(m – 5)(m + 5) = 99
(m – 10)(m + 10) = 99
m2 – 25 = –99
m2 – 100 = –99

Answers

in my opinion the answer is m2 – 100 = –99
proof
m2 – 100 =(m – 10)(m + 10)
for eg. m=1, (-9)(11)= –99

The equation can be used to find m, is [tex]m^{2} -100 = -99[/tex].

What is equation?

An equation is a mathematical statement that is made up of two expressions connected by an equal sign.

According to the given question.

We have two numbers.

Both are 10 m away from their midpoint, m.

Therefore,

If the first number is ( m + 10).

Then the second number will (m-10).

Also it is given that the product of these two numbers is 99.

⇒ [tex]( m + 10)( m - 10) = -99[/tex]

⇒ [tex]m^{2} -10m + 10m -100 = -99[/tex]

⇒  [tex]m^{2} - 100 = -99[/tex]

Hence, the equation can be used to find m, is [tex]m^{2} -100 = -99[/tex].

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Find the values of x and y drawing not to scale

Answers

Part 1)

In this problem we know that

[tex]4y\°+112\°=180\°[/tex] ------> by supplementary angles

solve for y

[tex]4y\°=180\°-112\°[/tex]

[tex]y=68\°/4[/tex]

[tex]y=17\°[/tex]

Part 2)

In this problem we know that

[tex]7x+7=112\°[/tex] ------> by vertical angles

solve for x

[tex]7x=112\°-7\°[/tex]

[tex]x=105\°/7[/tex]

[tex]x=15\°[/tex]

therefore

the answer is the option A

[tex]x=15\°, y=17\°[/tex]

simplest form for 21/49

Answers

21/49
=3/7(divide by 7 numerator and denominator)
PLs brainliest answer

In 1991, the federal minimum wage rate was $4.25 per hour. In 1997, it was increased to $5.15. Find the annual rate of change in the federal minimum wage rate from 1991 to 1997

Answers

1991 = $4.25
1997 = $5.15
1hour = 60min
First you will have to multiply:
4.25 * 60 = 225
5.15 * 60 = 309
Then you subtract the answers you got together
309 - 225 = 84
So the the rate of change increases by 84!!
Hope This Helps!!
:)
Final answer:

The annual rate of change in the federal minimum wage rate from 1991 to 1997 is $0.15 per year.

Explanation:

The annual rate of change in the federal minimum wage rate from 1991 to 1997 can be found by calculating the difference between the final and initial values, and then dividing it by the number of years.

Initial value in 1991: $4.25

Final value in 1997: $5.15

Difference: $5.15 - $4.25 = $0.90

Number of years: 1997 - 1991 = 6 years

Annual rate of change: $0.90 / 6 = $0.15

Therefore, the annual rate of change in the federal minimum wage rate from 1991 to 1997 is $0.15 per year.

Traveling at 45 miles per hour, how many minutes, rounded to the nearest whole number, does it take to drive 240 miles from Orlando to Miami?
a. 5
b. 195
c. 285
d. 320

Answers

Divide 240 by 45 you would get 5 and 1/3, multiply 5 and one third by 60 and it would result in 320.

D. 320 would be the correct answer.
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