1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alona [7]
1 year ago
14

HELP!!

Mathematics
2 answers:
oksano4ka [1.4K]1 year ago
6 0

\qquad \qquad  \bf \huge\star \:  \:  \large{  \underline{Answer} }  \huge \:  \: \star

  • x + 1/x = 7

\textsf{  \underline{\underline{Steps to solve the problem} }:}

\qquad❖ \:  \sf \: {x}^{2}  +  \cfrac{1}{  {x}^{2} }  = 47

\qquad❖ \:  \sf \: {x}^{2}  +  \cfrac{1}{  {x}^{2} } + 2 - 2  = 47

( adding and subtracting 2, doesn't change the value )

\qquad❖ \:  \sf \: {x}^{2}  +  \cfrac{1}{  {x}^{2} } + 2  = 47 + 2

\qquad❖ \:  \sf \: {x}^{2}  +  \cfrac{1}{  {x}^{2} } +  \bigg(2 \sdot x \sdot \cfrac{1}{x}  \bigg)  = 49

( x cancel out, so no change in value )

\qquad❖ \:  \sf \: \bigg(x +  \cfrac{1}{x}  \bigg) {}^{2}  = 49

( use identity a² + 2ab + b² = (a + b)² )

\qquad❖ \:  \sf \: \bigg(x +  \cfrac{1}{x}  \bigg) {}^{}  =  \sqrt{49}

\qquad❖ \:  \sf \: x +  \cfrac{1}{x}  {}^{}  =  \pm7

since we have to take positive value, i.e greater than 0

\qquad❖ \:  \sf \: x +  \cfrac{1}{x}  {}^{}  =   7

\qquad \large \sf {Conclusion}  :

Therefore, the required value is 7

VMariaS [17]1 year ago
4 0

Answer:

  • x+\cfrac{1}{x} =7

================

<h3>Given:</h3>

  • x^2+\cfrac{1}{x^2} =47

Add 2 to both sides of equation:

  • x^2+\cfrac{1}{x^2}+2 =47+2

Then follow the steps:

  • x^2+\cfrac{1}{x^2}+2*x*\cfrac{1}{x} =49
  • (x+\cfrac{1}{x})^2=7^2

Take square root of both sides to get:

  • x+\cfrac{1}{x} =\pm\ 7

We are taking the positive value as we are told x > 0, hence the answer is 7.

You might be interested in
Donna bought 5 bags of dog treats for $14.00. What is the cost per bag of dog treats?
Alex17521 [72]

Answer:

2.8

Step-by-step explanation:

14 divided by 5=2.8

Hope this helps you! <3

6 0
2 years ago
Read 2 more answers
Please Explain!!<br> I need help plss
Nimfa-mama [501]

Answer:

See step by step

Step-by-step explanation:

For A. use any two factors that multiply to 100 that isn't 25 and 4.

For b Use one obtuse angle (angle over 90 degree) and two acute angles. Make sure they add up to 180.

For c Use any two values that add up to 52 since they didnt establish y as the midpoint.

For d. measure of angle 1 is 45 and measure of angle 2 is 45 degrees

6 0
3 years ago
Read 2 more answers
Write a function rule that represents the sentence.<br> y is 4 less than the product of 7 and x.
goldenfox [79]
Answer:

y = 7x - 4

just as it says in words
3 0
2 years ago
−14 − 8x = −2(−3x + 7)
marissa [1.9K]

Answer:

-8x=6x+14-14

-8x-6x=0

-14x=0

X=0/14

X=0

?????

6 0
3 years ago
Read 2 more answers
1.Dakota bought 1.7 pounds of​ ham, 3.15 pounds of​ onions, and 6 cans of soup. What was the total cost before sales​ tax? Round
MrRa [10]

Answer: 15.73

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • Please help! I'm not very good with geometry ;~;
    14·2 answers
  • A researcher is interested in determining whether a new drug lowers blood pressure more than a leading drug. The average systoli
    11·2 answers
  • Find an equation of the line in the form axplus byequals
    14·1 answer
  • The sales tax in the city of Taxemalot is 8.1%. What is the growth factor for any item purchased at your local Tarmart? a.8.1 c.
    7·1 answer
  • There are four basic operations: addition, subtraction, multiplication, and division. Do you think these four operations can be
    8·1 answer
  • The given line passes through the points and (4,1).
    15·1 answer
  • Graph the equation by plotting three
    9·2 answers
  • This is me. What is 50+ 50?
    14·2 answers
  • 6th grade math plz help?
    14·2 answers
  • Can Someone answer this please
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!