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
k0ka [10]
3 years ago
10

What are the real roots of 2x^3-42x-40

Mathematics
1 answer:
malfutka [58]3 years ago
7 0
2x^3-42x-40=0
2x^3-42x=40
2x(x^2-21)=40
a. 2x=40=>x=20
b. x^2=21+40=>x^2=61=>x=+-(radical(61)
You might be interested in
How many ways can we pick three distinct integers from {1, 2, ..., 15} such that their sum is divisible by 3?
gogolik [260]

Answer:

Clearly from 1 to 15 we can only have the sum 6,9,12 and 15 to be divisible by 3.

Now meaning we have 4! ( 4 factorial) which implies 4x3x2x1= 24 .

We have 24 ways to pick distinct integers that are divisible by 3.

Step-by-step explanation:

The first thing you need to do is to look for numbers that are divisible by 3. Then you take its factorial

5 0
3 years ago
An astronaut weighs 174 pound on earth and 29 pound on the moon, if his daughter weighs 108 pounds on earth, what is his daughte
jekas [21]

Answer:

If my thinking is right she should weigh about 18 pounds or so.

Step-by-step explanation:

17% of 174 is 29

17% of 108 is 18

4 0
4 years ago
Please someone help me with question number 2
Maru [420]

Answer:

75

Step-by-step explanation:

Just make the number of regular gasoline sold to be x, while the number of premium gasoline sold to be (550-x).

That's all.

And goodluck.

3 0
3 years ago
2x-9<-1 pleassssssse help me​
e-lub [12.9K]

Answer:

x <4

Step-by-step explanation:

2x-9<-1

Add 9 to each side

2x-9+9<-1+9

2x < 8

Divide each side by 2

2x/2 < 8/2

x <4

5 0
3 years ago
Read the paragraph below. Which would be the most helpful peer review comment to make about the writer’s style?
sasho [114]

Answer:

“I think wolves are scary, too. You’ll have to do more to convince me that they’re not!”

Step-by-step explanation:

5 0
2 years ago
Other questions:
  • The ratio of boys to girls in the school chorus is 3:2. If there are 39 boys in the chorus, how many girls are in the chorus?
    6·1 answer
  • Determine whether the function is a linear transformation. T: P2 → P2, T(a0 + a1x + a2x2) = (a0 + a1 + a2) + (a1 + a2)x + a2x2.
    13·1 answer
  • Solve triangles using the law of sines.
    7·2 answers
  • How can you use the Pythagorean Theorem to solve real-world problems?
    6·1 answer
  • Brad had a small gathering at a local steakhouse. The steakhouse offers three dinner platters which vary by size and price. They
    13·1 answer
  • Which represents a quadratic function?
    9·1 answer
  • 3x+6y=24 can someone help me ehat this
    6·1 answer
  • Which of the following characteristics of the set {(0 , 8), (8 , 0), (1 , 6), (6 , 1), (2 , 4), (4 , 2)} make it a function?
    14·1 answer
  • Which is a pair of equal expressions?
    8·2 answers
  • Andrea runs 4 miles every day, but she wants to increase her distance in order to run a 26 mile marathon. She decides to add 2 m
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!