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
skad [1K]
4 years ago
10

Solve the quadratic equation below by completing the square

Mathematics
2 answers:
tia_tia [17]4 years ago
6 0

Answer:

n = -5/2 and n = 13/2


seraphim [82]4 years ago
5 0

Step-by-step explanation:

4·n^2 - 16·n - 21 = 44

4·n^2 - 16·n = 65

n^2 - 4·n = 65/4

n^2 - 4·n + 4 = 65/4 + 4

(n - 2)^2 = 81/4

n - 2 = ± 9/2

n = 2 ± 4.5

n1 = -2.5 or n2 = 6.5




You might be interested in
Joan can make and bottle 8 smoothies an hour. if she works with a friend they can make and bottle 18 smoothies an hour. what is
alex41 [277]
The marginal product of the labor which joan can make a bottle 8 smoothies in an hour and when she is wokring with her friend they can make a total of 18 bottle of smoothies an hour. The formula is 18 / 2 = 9.9 is the marginal product of labor.So the answer is C. 9
7 0
3 years ago
Read 2 more answers
Order these fraction from to : 2/3 , 7/12 , 3/4
lora16 [44]

I didn't really know whether to do it from least to greatest or greatest to least, so I did it from least to greatest.

Steps:

1. Find a common denominator

Let's do 12

2. Convert

7/12 is already in its simplest form, so 2/3 = 8/12 and 3/4 = 9/12

3. Order

7/12, 8/12, 9/12

4. Back to original form

7/12, 2/3, 3/4

ANSWER: 7/12, 2/3, 3/4

7 0
3 years ago
Read 2 more answers
BRAINLIEST! URGENT! If you can answer this, please help. If you can explain how you got that answer, I will mark you Brainliest.
Karo-lina-s [1.5K]

Answer:

\mathrm{A.\:}x+2y=a

Step-by-step explanation:

In standard form ax+by=c, any point the line passes through will make the inequality true. We can simply use any point given to find the equation of the line:

We can write the following system of equations from two points from the table:

\begin{cases}d\cdot3a+e\cdot(-a)=f\cdot a\\d\cdot5a+e\cdot(-2a)=f\cdot a\end{cases}

Solving, we get:

For a \notin 0,

d=1,\\e=2,\\f=1

Therefore, our equation is:

dx+ey=fa,\\1x+2y=1a,\\\fbox{$x+2y=a$}.

8 0
3 years ago
Solve for x.<br> 18 + x= -2<br> x= <br><br> Help!
kherson [118]
X=-20

-20+18=2
The number that is bigger is negative so therefore the answer would be negative
7 0
4 years ago
Read 2 more answers
Kelly wants to buy a pair of pants that regularly cost $29.99, but they are on sale for 20% off. How much would Kelly pay for th
PolarNik [594]

Answer:

Black Friday sales

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • a family pays $45 each month fpr cable television. the coat increase 7% how many dollars is the increase
    10·2 answers
  • For several hours you watch a group playing dice on the street and you notice that the owner of the dice often wins. do you conc
    7·2 answers
  • The smiths spent 2,000 on clothes in a particular year if they increase the amount they spend on clothes by 10% each year the sm
    10·1 answer
  • Can someone please help me on this one?
    14·2 answers
  • In large container holds the gallons of water. He begins and he can get a constant rate. After 40 minutes of the container has 5
    10·1 answer
  • Name the values represented by the box plot.
    11·1 answer
  • Hi i need help with this algebra vocabulary please
    8·2 answers
  • Find all real values of a such that the given matrix is not invertible.
    12·1 answer
  • What is the value of x?<br> X<br> 60°<br> 14
    9·1 answer
  • He cone below has a radius of 3 inches, a height of 4 inches, and a slant height of 5 inches.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!