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
zubka84 [21]
1 year ago
6

If the sum of the roots of the equation 3x² + kx + 1 = 0 is 7. then what the value of k​

Mathematics
1 answer:
koban [17]1 year ago
7 0

Answer:

The value of k is -21

Step-by-step explanation:

ax² + bx + c = 0

Sum of the roots = -b/a

3x² + kx + 1 = 0

= sum of the roots = -k/3

-k/3 = 7

Now, Multiply both side by (-3) we get,

(-3)-k/3 = 7(-3)

k = -21

Thus, The value of k is -21

<u>-TheUnknownScientist</u><u> 72</u>

You might be interested in
Pls help!!! What is this expression in simplified form?
Tasya [4]

Answer:

My guess would be D

Step-by-step explanation:

8 0
2 years ago
A library has at least 900 square feet to create a new study area. Each study cubicle uses 6 square feet, and each computer stat
lina2011 [118]

Answer:

6s + 8c ≥ 900

Step-by-step explanation:

The library has <em>at least</em> 900 square feet available. It means <em>900 or more</em>.

If s is the number of study cubicles and c is the number of computer stations, the total space occupied by them is 6s+8c. That space is 900 or more square feet, so our inequality is 6s + 8c ≥ 900

4 0
3 years ago
When the sample size and sample standard deviation remain the same, a 99% confidence interval for a population mean, µ will be n
motikmotik
A 99% confidence interval will be wider compared to a 95% confidence interval. This is because while you don't know what the true value of mu is, you are more confident that the parameter is in the interval.

In essence, you are casting a wider net which leads to the higher level of confidence. Imagine if there was a 100 mile stretch of straight land, and somewhere on this line was a special rock that you are looking for. You would be 100% confident if you said "the rock is somewhere on that piece of land", and less confident the more you shrunk the interval.
5 0
3 years ago
Heyy Answer please and explain
ludmilkaskok [199]

Answer: V=37.5 cm³

Step-by-step explanation:

Formula

V=(πr²h)/3

Given

r=5/2=2.5 cm

h=6 cm

Solve

V=(πr²h)/3

V=(π(2.5)²(6))/3

V=(π(6.25)(6))/3

V=37.5π/3

V=37.5(3)/3

V=37.5 cm³

Hope this helps!! :)

Please let me know if you have any questions

5 0
3 years ago
4n+78n-3/4=942???<br>PLEASE SHOW STEPS ON HOW YOU GOT IT!
Rainbow [258]
4n+78n-3/4=942
     l
   82n - 3/4=942
           +3/4  +3/4(.75)
    82n=942.75
    divide 82 by both sides
     n = 11.49 or 11.5
6 0
3 years ago
Read 2 more answers
Other questions:
  • Show all your work. Indicate clearly the methods you use, because you will be scored on the correctness of your methods as well
    8·1 answer
  • Ecologists sometimes find rather strange relationships in our environment. For example, do beavers benefit beetles? Researchers
    10·1 answer
  • Please help me it’s in my math class
    8·1 answer
  • Given the function h(x)=x2+6x+6h(x)=x^2+6x+6h(x)=x2+6x+6, determine the average rate of change of the function over the interval
    9·1 answer
  • I am so confused please help
    15·2 answers
  • (07.03 LC)
    13·1 answer
  • Will a fraction increase or decrease and by what percent if its numerator is increased by 20% and its denominator is increased b
    13·1 answer
  • Let's get the most people to like both of the answers anyone can ask, share this with all of your friends, let's get at least 10
    12·1 answer
  • Pls help and hurry NO LINKS
    6·1 answer
  • Simplify as far as possible.<br>1<br>3cos (180° + x)sin (360° - X)<br>sin (360° + x)cos (180° - x)​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!