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
Lelu [443]
3 years ago
11

The graph of f(x)=2x^3+x^2-4x-2 is shown. How many of the roots of f(x) are rational

Mathematics
2 answers:
Alexeev081 [22]3 years ago
7 0

We can one theorem to help us find rational roots of this polynomial.

2x^3 + x^2 - 4x - 2

We'll use Descartes' rule of signs.

Because there is 1 sign change, 1 of the 3 roots will be positive.

Now we can make the value of x -1 to see how many negative roots there will be.

-2  + 1 + 4 - 2

There are 2 sign changes, so we know there will be 2 negative roots.

Because of this, we should have 3 real, rational roots.

ohaa [14]3 years ago
6 0

Answer:

The answer is 1

I don't know the step-by-step explanation

Step-by-step explanation:

You might be interested in
What's the simplified form of this expression? 3-[-2/3 x (7 +2) =11]
svetoff [14.1K]

Answer:

x = 4/3

Step-by-step explanation:

7 0
3 years ago
Find the volume of the composite solid shown below, Round answer to the nearest hundredth.
MrMuchimi
First you’d start off by finding the volume of the rectangular prism on the bottom. The formula for this is lwh or (length*width*height) so you’d plug in the numbers and get 4*4*5 which multiplies out to be 80inches cubed. Next you’d have to find the volume of the pyramid by using the formula lwh/3 or ((length*width*height)/3) so it would be ((4*4*6)/3) and that equals 32inches cubed. Finally, you add the 2 volumes together so 80inches cubed+32inches cubed and get 112inches cubed. Hope this helps
4 0
3 years ago
BRAINLIEST WILL I GIVE HURRY
stepladder [879]

Answer:

{10,8}

Step-by-step explanation:

-3x + 4y = -62

4x + 5y = 0

let's eliminate the x

-3x + 4y = -62 | x -4 |

4x + 5y = 0 | x 3 |

12x - 16y = 248

12x + 15y = 0

-------------------- -

-31y = 248

y = 248/(-31) = 8

since you must do this proble with elimination, we cant use subtitution. so we repeat the way once more to find x (eliminate y)

-3x + 4y = -62 | x 5 |

4x + 5y = 0 | x 4 |

-15x + 20y = -310

16x + 20y = 0

-------------------- -

-31x = -310

x = -310/-31 = 10

4 0
3 years ago
During April it was recorded that there were 19 days when it rained, mostly cloudy on 6 days and sunny on 5 days inference in th
Anika [276]

Answer:

I would defend this

Step-by-step explanation:

This makes sense because April is the rainiest month of the year. It's even shown in the say that April showers bring May flowers.

5 0
2 years ago
If x = 4 and y = 7, evaluate the - following expression: 20 +2(3y - 4x)​
Andrei [34K]

Answer:

30

Step-by-step explanation:

20+2(3*7 - 4*4)

20+2(21-16)

20+2*5

20+10

30

8 0
3 years ago
Read 2 more answers
Other questions:
  • Help. Please. Thanks.
    14·1 answer
  • Ruby is visiting a wildlife center to gather information for her term paper. The center has a circular pond with a diameter of 2
    10·2 answers
  • Please Help ! Will Reward Brainliest
    7·1 answer
  • Craftworks rents a storage space that measures 250 ft x 300 ft x 50 ft. Craftwork pays $1500 for the storage space each month. W
    9·2 answers
  • I’m thinking of a number between 1 and 10 if I take the number and add4 to it and then multiply by 3 I get 30
    13·2 answers
  • Anna is making a gallon of iced tea, which requires 6 cups of iced tea mix. She only has 1/4 - cup measuring cup. How many 1/4 s
    9·1 answer
  • 3) This decimal is colored to show<br> 1
    5·1 answer
  • Which expression can be used to convert 22 Australian dollars to US dollars?
    8·1 answer
  • A small airplane is flying at a speed of 15,840 feet per minute. What is the airplane's speed in miles per hour?
    5·1 answer
  • IM IN A HURRY PLEASE HELP ME QUESTION IS DOWN BELOW WORTH 15 POINTS each
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!