Mathematics College

Find all values f x that make the equation true: 4/x+4=x-2/x

Answers

Answer 1

Step-by-step explanation:

4/x + 4 = x - 2/x

multiply everything by x

4 + 4x = x² - 2

x² - 4x - 6 = 0

the general solution to such a quadratic equation

ax² + bx + c = 0

is

x = (-b ± sqrt(b² - 4ac))/(2a)

in our case

x = (4 ± sqrt((-4)² - 4×1×-6))/(2×1) =

= (4 ± sqrt(16 + 24))/2 = (4 ± sqrt(40))/2 =

= (4 ± sqrt(4×10))/2 = (4 ± 2×sqrt(10))/2 =

= 2 ± sqrt(10)

x1 = 2 + sqrt(10) = 5.16227766...

x2 = 2 - sqrt(10) = -1.16227766...

Related Questions

(3,3) (3,3) endpoints of a vertical line, a horizontal line, or neither?

Answers

Answer:

neither

Step-by-step explanation:

the endpoints are the same so it would be neither because it's a point not a line.

Anyone can help please?

Answers

X=60°

because 33+87= 120 and 180-120=60


1600, 400, 100, 25, ...
O Arithmetic
O Geometric
O Neither

Answers

This is a GEOMETRIC sequence as each number is being multiplied by 1/4

whats the square footage of 10 by 10​

Answers

Answer: 100 square feet

How many square feet is a 10x10 room? The square footage of a room 10 feet wide by 10 feet long is 100 square feet. Find the square footage by multiplying the width (10 ft) by the length (10 ft).

-2x + y=-15. y=5x solved by substitution

Answers

Answer:

−

2

+

=

−

1

5

=

5

Step-by-step explanation:

5x= answer

please help urgent!!!!

Answers

Answer:

1

Step-by-step explanation:

see attached for more information

hope it's helps

Lester made a scale drawing of a house. The scale he used was 1 inch : 2 feet. In the drawing, the hall closet is 3 inches long. What is the length of the actual closet?

Answers

Answer: 6 feet

Step-by-step explanation:

1 inch= 2 feet

so

3 inches = 6 feet

ratio

Answer: 6

Step-by-step explanation:

Find the value of x in the parallelogram below.

Answers

Answer:

B)  x = 12

Step-by-step explanation:

m∡EOU = m∡TQE

m∡EOU =180 - (39+45) = 96°

m∡TQE:  7x + 12 = 96

7x = 84

x = 12

Which of the following sequences of transformations maps KLMN onto ABCD

Answers

Answer:

The answer is neither.

Step-by-step explanation:

Just did the test on Khan.

Enter a value of b that will make the expression factorable.
x2^ + bx – 40

Answers

B would be 6
X^2+6x-40
(x-4)(x+10)

HELP PLEASE! MATHHHHGGKSNSJSJ

Answers

Answer:

192y16

Step-by-step explanation:

mark me brainlist

Victor sells bouquets of flowers at a farmers market. He earns a flat rate for each bouquet sold, shown on the graph below. The table below shows the number of bouquets Victor sold last week. Fill in the table to show how much money Victor earned.

Answers

Answer:

Attach the graph so we can help lol

Step-by-step explanation:

Find the area of each figure. A = _ in²

Answers

Answer:

1824in^2

Step-by-step explanation:

area of rectangle:

L x W = A

32 x 48 = 1539

area of triangle:

(L x W) / 2 = A

(48 x 12) / 2 = 288

add:

1539 + 288 = 1824in ^2

mark the points on the graph !!! please help

Answers

Answer:

Go to an online grapher called desmos . com where you can graph and get the answer! The website is used in khan academy

Step-by-step explanation:

pls help pls help plsssssss

Answers

For the 1st question your just going to

Can someone help me with this its preatty easy

Answers

Answer:

31,400

Step-by-step explanation:

Hope this helps and have a wonderful day!!!

Which statement must be correct?
A.
B.
C.
D.

Answers

Answer:

A suits the most

Step-by-step explanation:

Answer:

D. RS intersects PQ at point R

Step-by-step explanation:

COMMON CORE REVIEW
1. Find the percent of change from 32 feet to 79 feet. Round to the nearest tenth, if necessary. Then state whether the percent of change is percent of increase or percent of decrease.
2. Factor this expression: 27+108n
3. Factor this expression: 56x + 16

THANKS AGAIN!!

Answers

Answer:

146.9

Step-by-step explanation:

I'm not sure of the answer but if I'm wrong tell me I'll continue trying it is a pleasure to help you.

Find the mean of the set of data.
3, 3, 8, 3, 8, 3, 8, 8, 1,3
The mean is ?? HELP WILL MARK BRAINLIEST

Answers

Answer:

Step-by-step explanation:

8

Step-by-step explanation:

48 because your adding them all up

Whats 2x36 PLEASE HELP ILL GIVE BRAINLYEST

Answers

Answer:

It is 72

Step-by-step explanation:

Hope it helps

Answer:

72

Step-by-step explanation:

It was very easy question.

1 + 4 = 5
2 + 5 = 12
3 + 6 = 21
5 + 8 =​

Answers

The answer would be 13, good luck.

calculeaza
2+(8-6)=
(9-7)+5=
10-(1+8)=
(3+7)-9=
(1+2+3)-5=
10-(2+3+4)=​

Answers

Answer:

1. 2+(8-6)= 4

2+2=4

2. (9-7)+5= 7

2+5=7

3. 10-(1+8)= 1

10-9=1

4. (3+7)-9= 1

10-9=1

5. (1+2+3)-5= 1

6-5=1

6. 10-(2+3+4)=​ 1

10-9=1

The price of an item has risen to $184 today. Yesterday it was $80. Find the percentage increase.

Answers

130% because if 80 =100% you take way 80 fro 184 to get 104 and get the % of that

How
many solutions does the equation 4X + 8 = - 2 - 2 + 5x have?
Two
® One
Zero
Infinitely many

Answers

Answer:

x = 12

Step-by-step explanation:

by direct solution

otherwise this system many solution

Answer:

one

Step-by-step explanation:

4x+8=-4+5x

or, 5x-4x = 8+4

hence,

x=12

A garden is in the shape of a circle with a radius of 10 feet. Edging is place around the garden. How much edging, in feet, is needed to
go around the garden? Round your answer to the nearest whole number. Use 3. 14 for TT.
please!! I need it right jnow

Answers

Answer:

62.8 ft (of edging)

Step-by-step explanation:

We need to find the circumference of this circle, using C = 2(pi)r.

Here, C = 2(3.14)(10 ft) = 62.8 ft (of edging)

Answer:

63 feet is needed to  go around the garden.

⊕║Using Sampling to Predict Lesson 10-5║ ⊕


To determine how many students at a middle school bring their lunch from home, all the students on one school bus are surveyed. identify if this is BIASED OR UNBIASED. Explain your reasoning!!

Answers

I would say biased because only the student on one school bus are being surveyed. While there are other buses of kids and kids who get dropped off. So they are in a way discriminating those other kids. Just surveying one bus of kids out of all the other kids won’t get the correct number of students who bring their lunch from home.

Please answer now! i will mark brainliest!

Answers

Answer:

I would round to 3, so the length of the sidewalk would be about 8 x 3 = 24 feet.

Step-by-step explanation:

[tex]2\frac{5}{6}[/tex] is closer to 3 and if you convert it to decimal which will be 2.83 with a bar on top of 3, it's still close to 3.

The New York Times and CBS News conducted a nationwide poll of 1048 randomly selected 13- to 17-year-olds. We can consider the sample to be a SRS.
a. Of these 1048 teenagers, 692 had a television in their room. Give a 95% confidence interval for the proportion of all people in this age group who had a TV in their room at the time of the poll
b. Of the 1048 teens surveyed, 189 named Fox as their favorite television network. Give a 90% confidence interval for the proportion of all people in this age group who would choose Fox as their favorite network.
c. Suppose you were to change the confidence level in (b) to 95% using the same sample. How would the confidence interval change? No calculations necessary.
a. The confidence interval would be the same width but shifted to the left
b. The confidence interval would be the same width but shifted to the right
c. The confidence interval would have the same center but be wider
d. The confidence interval would have the same center but be narrower

Answers

I’m sorry can u explain better pls?? Thanks that’s will help so much!!

I need help on homework its due tomorrow

Answers

look this up on quizlet

Pls help I’ll mark brainliest

Answers

Answer:

Answer:

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