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
weqwewe [10]
3 years ago
6

How many real roots does the following equation have? x4 -81 = 0

Mathematics
2 answers:
vazorg [7]3 years ago
5 0
X^4-81 =
(x^2-9)(x^2+9) =
(x+3)(x-3)(x^2+9)

There are two real roots (at x=3,-3).
Zepler [3.9K]3 years ago
4 0

Answer:

Find roots of x4−81=0 by solving for x. x=3,−3

Step-by-step explanation:

You might be interested in
Sasha purchased paint that will cover 400 square feet per gallon. Sasha needs to paint a 4704-square-foot surface with 2 coats o
ratelena [41]

Answer:

D. 24

Explanation:  

First you would need to find how many you need for one coat.

400 times 12 = 4,800

(That will give you a little extra paint)

Then just double 12 to get two coats and you would get D.

Have a nice day!

Hope this helped.

6 0
3 years ago
Steve can jog 14 miles in 2 hours. At this rate, how many miles can he jog in 1/4 hour?
Assoli18 [71]

Answer:

1  3/4 miles in 1/4 hour.

Step-by-step explanation:

Write and solve an equation of ratios:

 x           (1/4) hr

--------- = ------------

14 mi       2 hr

Cross multiplying, we get 2x = (1/4)(14), or

                                              x = (1/4)(7), or x = 7/4

Steve can jog 7/4 miles in 1/4 hour.  That's 1  3/4 miles in 1/4 hour.

4 0
3 years ago
Read 2 more answers
What is the balanced equation for the reaction (NH4)2SO4+SrCl2-->
steposvetlana [31]
(NH4)2SO4+SrCl2--><span>(NH4)2Cl2 + SrSO4

The reaction side are both aquas and the product is aquas and a solid precipitate. </span>
7 0
3 years ago
The length of a rectangle is three more than twice the width. The perimeter is 96. What are the dimensions? ​
SIZIF [17.4K]

Answer:

Width =15

Length =33

Step-by-step explanation:

Take width as x

And length as 2x+3

Perimeter as 96

Formula of the perimeter of a rectangle is 2l+2w

X+×+2×+3+2×+3=96

6x+6=96

6x=96-6

6×=90

X=15

Width =x and x =15 so width =15 while length =33

7 0
3 years ago
How.to find domain and.range of.a.function?
mestny [16]
Depends greatly on the type of function.
Some things to keep in mind:
1.) the value of the denominator of a fraction cannot be zero
2.) the inside of an even root cannot be less than zero
3. The argument of a logarithmic function must be greater than zero
4. Plus many more other rules and such

But a simpler explanation, just find out what values x can be for the given function, and what y can be.
The x values make up the domain, the y, the range

Graphs are helpful
Hope this helps!
8 0
3 years ago
Other questions:
  • Simplify 6(x+y)+(x-y)
    6·2 answers
  • PLEASE HELP!! SIMPLE QUESTION!!
    7·2 answers
  • What’s the percent of 4.3% of 1200
    13·2 answers
  • A bus travels 30 miles in 40 minutes.how many miles does the bus travel in 60 minutes at this rate?
    10·2 answers
  • HELPPP THIS IS MY LAST QUESTION
    8·1 answer
  • The binomial (2x+9) is a factor of a quadratic equation 14x^ +57x - 27. What is the other factor of this expression?
    8·1 answer
  • Pls anwser these two question easy math
    9·1 answer
  • I need help with numbers 17 and 11. worksheet down below :) thank you. I'm using all my points so let this be the time I use my
    13·2 answers
  • This shake is made from five congruent triangles. Find the total area of the shape
    14·1 answer
  • IF YOU ANSWER IN THE NEXT 3 MIN. AND GET IT RIGHT! YOU WILL BE THE BRAINIEST!!!
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!