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
lawyer [7]
2 years ago
15

What is the answer for 2n^2-8n=-9 ?

Mathematics
1 answer:
lbvjy [14]2 years ago
5 0

2n^2-8n=9

divide by 2

2(n^2-4n) =9

add (4/2)^2 =4 to each side  completing the square

(n^2-4n+4 ) =9/2+4

(n-2)^2 = 9/2+8/2

(n-2)^2 =17/2

take the square root of each side

n-2 = +-sqrt(17/2)

add 2 to each side

n = 2+- sqrt (17/2)

Answer:2+ sqrt (17/2),2- sqrt (17/2)


You might be interested in
Cereal is on sale this week. Is it a better buy to get the 10-ounce box for $1.76 or the 14-ounce box for $2.42?
Veseljchak [2.6K]

Answer:

292381g56i3yg8

Step-by-step explanation:

4 0
2 years ago
A parking space shaped like a parallelogram has a base of 17 feet and a height of 9 feet if a mini car 6 feet long and five feet
lesantik [10]

Answer:

123 cm²

Step-by-step explanation:

First of all, we need to know how exactly to find the area of a parallelogram.

<u>Area</u><u> </u><u>of</u><u> </u><u>parallelogram</u><u>=</u><u> </u><u>Base</u><u>*</u><u>Height</u>

PARALLELOGRAM-

BASE= 17 ft

HEIGHT= 9ft

AREA= 17*9= 153 cm²

The area of parallelogram, will be considered as WHOLE AREA.

Now,

AREA OF MINI CAR-

length= 6 ft

Width= 5 ft

Area= 6*5= 30 ft ²

Square feet uncovere-

153 ft²- 30 ft²= 123 ft²

HOPE IT HELPS!

8 0
2 years ago
I need the help ASAP, please and thank you :)
SVEN [57.7K]

Answer: Im struggling to understand this one and im in highschool my brain is melting.

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Danny got a raise and now makes $58,965.95 a year. Round this number to the
Fantom [35]

Answer:

c) ten thousand dollars

Step-by-step explanation:

6 0
2 years ago
A number from 1 to 25 is chosen at random what is probability of choosing a factor of 10 , an even number or a 7, a smaller numb
Ahat [919]

Step-by-step explanation: need to find a basis for the solutions to the equation Ax = 0. To do this ... 0 0 0 1 −3. ⎤. ⎦. From this we can read the general solution, x = ⎡. ⎢. ⎢. ⎢. ⎢. ⎣ ... two vectors are clearly not multiples of one another, they also give a basis. So a basis ... 4.4.14 The set B = {1 − t2,t − t2,2 − 2t + t2} is a basis for P2.

4 0
2 years ago
Other questions:
  • Rose bought a new hat when she was on vacation.The following formula describes the total amount Rose paid t = c + cb = total cos
    7·2 answers
  • What is the value of "x" in this equation: x + 4 = 15 *
    15·2 answers
  • Please help explain why if so thank you :)
    7·2 answers
  • Estimate 8/9 + 4/7<br> Sum or difference
    6·1 answer
  • Which of the following statements correctly explains the coefficient of variation (CV)?
    7·1 answer
  • Liam saves $12 of his allowance each week. How much will he save in 14 weeks?
    15·2 answers
  • HELP I NEED HELP ASAP
    5·1 answer
  • Please help (get brainliest)
    14·1 answer
  • Plz help me! I’m not sure how to do these!
    14·1 answer
  • Which statement is true about the equations –3x + 4y = 12 and x - y = 1?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!