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
olga55 [171]
3 years ago
9

A) Show that the equation 20-x^3-7x^2=0 can be rearranged to give x=20/x^2 - 7

Mathematics
1 answer:
AVprozaik [17]3 years ago
4 0

Answer:

Step-by-step explanation:

      20-x^3-7x^2=0

a)

  • Add x^3 to both sides of the equation:     20-7x^2=x^3
  • Divide both sides by x^2:    \frac{20}{x^2} -\frac{7x^2}{x^2} =\frac{x^3}{x^2}  ⇒  \frac{20}{x^2} -7 =x

b)

    x_1=\frac{20}{(x_0)^2} -7

⇒ x_1=\frac{20}{(-9)^2} -7

⇒ x_1=-\frac{547}{81}

    x_2=\frac{20}{(x_1)^2} -7

⇒ x_2=\frac{20}{(-\frac{547}{81})^2} -7

⇒ x_2=-6.561443673...

   x_3=\frac{20}{(x_2)^2} -7

⇒ x_3=\frac{20}{(-6.561443673...)^2} -7

⇒ x_3=-6.535451368...

c) approximation to the location of one of the roots of the equation.  Each iteration gives a slightly more accurate value of a root x.

You might be interested in
The graph below belongs to which function family?
svet-max [94.6K]
The answer is the last one (absolute value)
6 0
4 years ago
Read 2 more answers
This graph shows a proportional relationship. What is the constant of proportionality? Enter your answer as a ratio in simplifie
AnnyKZ [126]

The answer is 5/4. I just took the test.

4 0
3 years ago
Read 2 more answers
PLEASE HELP!<br><br> 36&lt;8p+4&lt;44<br> The solution set is__.
Nataliya [291]
4<p<5
(4,5) 
Open circles, not shaded. 
Hope this helped!
5 0
4 years ago
Which of the following values in the set below will make the equation 2x + 1 = 3 true? (Only input the number.)
slava [35]
The only one that makes sense is 1
7 0
4 years ago
Read 2 more answers
What is the value of the x-coordinate of point W? Enter your answer as a decimal to the nearest o.5.
Rus_ich [418]

Answer:

The value of the x-coordinate is -3.5.

Step-by-step explanation:

To determine the x-coordinate you have to look at how far the point is on the x-axis which is the sideways line of the graph.

Point W is between -3 and -4 on the x-axis which would make the x-coordinate -3.5.

Hope this helps!

5 0
3 years ago
Other questions:
  • About 620,000 people live in Alaska.That number is just 120,000 more than the number of people who died in the civil war.How man
    10·1 answer
  • Find the unit rate for 50 miles on 2 1/2 gallons
    14·2 answers
  • What is the constant of proportionality for y=4x
    8·1 answer
  • *falls on floor crying*❤️❤️❤️❤️
    10·1 answer
  • Let the universal set U = {weekdays}. If T = {Tuesday, Thursday}, what is T'?
    14·1 answer
  • ⚠️ HELP ⚠️
    15·2 answers
  • Molly bought a pair of gloves and a skirt.
    12·1 answer
  • 3. In a group of students of them are Science Club members and the rest are Mathematic
    6·1 answer
  • Hi! are you good at math? well feel free to help!
    14·1 answer
  • Do you ever put too much pressure on yourself when you don’t accomplish your goals as quickly as you would have liked? 3 senten
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!