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
Ilia_Sergeevich [38]
3 years ago
15

Find the value of k such that the quadratic equation x(x-2k)+6=0 has real and equal roots

Mathematics
1 answer:
Musya8 [376]3 years ago
4 0

Answer:

k= \frac{x^{2}+6 }{2x}

Step-by-step explanation:

x(x−2k)+6=0

Step 1: Add -x^2 to both sides.

−2kx+x2+6+−x2=0+−x2

−2kx+6=−x2

Step 2: Add -6 to both sides.

−2kx+6+−6=−x2+−6

−2kx=−x2−6

Step 3: Divide both sides by -2x.

−2kx /−2x  = −x2−6 /−2x

k =

You might be interested in
Two numbers have an absolute value of 37. Which of the two number is farther from 1 on the number line
Brrunno [24]

If I understand what you're saying. It would be the absolute value of -37, which is 37. Also, the absolute value of 37 is 37.

3 0
3 years ago
Read 2 more answers
The area of a rectangle is 42 m2, and the length is
MrRissso [65]

Answer:

length = 14 m

width = 7 m

Step-by-step explanation:

l = length

w = width

l = 2w - 8

w(2w - 8) = 42

2w² - 8w - 42 = 0

you can factor out a 2 to work with smaller numbers:

w² - 4w - 21 = 0

(w - 7)(w + 3) = 0

w = 7

'w' cannot equal a negative so we discount it as an answer

find length:

l = 2(7) - 8

l = 14 - 8 or 6m

6 0
3 years ago
A 120-watt light bulb uses about 0.1 kilowatt of electricity per hour. If electricity costs $0.20 per kilowatt hour, how much do
saveliy_v [14]
There is no such thing as a "kilowatt per hour". If that's actually what the question says, then it's a defective question, and you should put it away before it makes you any more confused. A 120 watt light bulb uses exactly 0.12 kilowatt when it's turned on. In one hour, it uses (0.12 kilowatt) x (1 hour) = 0.12 kilowatt-hour of energy. If energy costs $0.20 per kilowatt-hour, then the cost is (0.12) x (0.20) = 2.4 cents. (0.024 dollar)
8 0
3 years ago
Let f (x) = -3x + 4. Describe the transformations from the graph of f to the graphs of g(x) = f (x) + 3 and h(x) = f (x - 2).
iris [78.8K]

Answer:

Answer:

g(x)=-6/5x+1/2

h(x)=-6/5x-1/2

Step-by-step explanation:

1).   g(x)=−f(x) ?

f(x)=6/5x−1/2

g(x)=−(6/5x−1/2)

g(x)=-6/5x+1/2

2). h(x)=f(−x) ?

f(-x)=6/5(-x)−1/2

f(-x)=-6/5x-1/2

h(x)=-6/5x-1/2

Step-by-step explanation:

5 0
2 years ago
A decimal fraction in which a figures is repeated and indefinitely
liq [111]

Answer:

A repeating decimal or recurring decimal is decimal representation of a number whose digits are periodic (repeating its values at regular intervals) and the infinitely repeated portion is not zero.

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • What is the answer???
    10·1 answer
  • A number x is more than -6 and at most 8. Write it in a inequality
    12·1 answer
  • If \$1000 is deposited into an account that earns 3.25\% simple interest per year, how much money will be in the account after 7
    14·1 answer
  • A rectangle has a width of 6 inches and a perimeter of 26 inches. What is the length of the rectangle?
    6·1 answer
  • A recipe that serves 6 uses 1 1/2 cups of flour. How many cups are needed to serve 15
    5·1 answer
  • Please Help! Thanks to whoever can answer this!
    5·1 answer
  • 2. There are two boxes. Each one contains paper slips marked 1 to 10. If we take one slip from each box, what is the probability
    14·1 answer
  • A shopkeeper allows 15% discount on the marked price, still he manages to have 7% profit. How much high did he mark his goods ab
    11·1 answer
  • A good faith estimate is required by law to be given by the lender to the borrower within three days of submitting a loan applic
    8·1 answer
  • In your job with the heating contractor you photograph houses with infrared film and use the pictures to determine where to plac
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!