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]
3 years ago
10

7x²+3y²-28x-12y=-19

Mathematics
1 answer:
grigory [225]3 years ago
4 0
Complete the square for x and y.

7x^2 + 3y^2 - 28x - 12y = -19

7x^2 - 28x + 3y^2 - 12y = -19

7(x^2 - 4x) + 3(y^2 - 4y) = -19

7(x^2 - 4x + 4) + 3(y^2 - 4y + 4) = -19 + 28 + 12

7(x - 2)^2 + 3(y - 2)^2 = 21

\dfrac{(x - 2)^2}{3} + \dfrac{(y - 2)^2}{7} = 1
You might be interested in
What is the answer to this equation?
My name is Ann [436]

Answer:W ^10

Step-by-step explanation:

The solution is in the

4 0
1 year ago
Find the area of a sector with a central angle of 125 degrees and a radius of 11cm. Express the approximate answer to the neares
White raven [17]
The answer is c I’m pretty aure
5 0
3 years ago
I really need help for these pleaseee!!!
Naddik [55]

Answer:

pat

Step-by-step explanation:

5 0
3 years ago
8 1/3 in a whole number
nikklg [1K]
I think the number is 8
6 0
3 years ago
Read 2 more answers
Which sequences are arithmetic? Check all that apply.
spin [16.1K]

Answer:

3)    18, 5.5, –7, –19.5, –32, …   sequence is in Arithmetic Progression.

5)     16, 32, 48, 64, 80         sequence is in Arithmetic Progression.

Step-by-step explanation:

If, a, b, c ,k, e ... is a given sequence.

Then the above sequence is in AP if b - a   =  c - b = k - c = ...

or, each term has same COMMON DIFFERENCE (d).

Here, take each sequence and check for the value of d.

1) –5, 5, –5, 5, –5, …

Here, 5 - (-5)  = 10,   -5 - 5  = -10

and 10 ≠ -10.  So the sequence is NOT in Arithmetic Progression.

2)96, 48, 24, 12, 6

Here, 48 - 96  = -48,   24 - 48  = -24

and -48 ≠ -24.  So the sequence is NOT in Arithmetic Progression.

3)18, 5.5, –7, –19.5, –32, …

Here, 5.5 - 18 = -12.5    ,  -7 - 5.5 = -12.5  ..

and -12.5 is the common difference.  

So the sequence is in Arithmetic Progression.

4)–1, –3, –9, –27, –81, …

Here, -3-(-1)  =  - 2     -9 - (-3)  = -6

and -2 ≠ -6.  So the sequence is NOT in Arithmetic Progression.

5)16, 32, 48, 64, 80

Here, 32 - 16 = 16    ,  48  - 32= 16  ..

and 16 is the common difference.  

So the sequence is in Arithmetic Progression.

6 0
3 years ago
Read 2 more answers
Other questions:
  • Can someone help me and do this for me were doing convert customary units if lenght
    6·2 answers
  • 7/10+2/5 please show work 30 POINTS
    15·2 answers
  • List all factors of 36
    10·1 answer
  • 40•1/5•3+8÷2<br><br>Simplify the Expression
    12·1 answer
  • Is the function even, odd, or neither
    9·1 answer
  • Find the slope and y intercept of the line in the graph
    5·1 answer
  • Compete in the Bottle Flip Challenge 3 times. Each time, you will have 1 minute to “cap” the water bottle as many times as possi
    14·1 answer
  • Simplify (3x2 + 2x - 3) (x + 5)​
    13·1 answer
  • The ratio of boys to girls in a class is 3:1. There are 36 students in the class. How many students are girls?
    10·2 answers
  • Berline.<br> a. -1<br> b. 1.75<br> c. -1.75<br> d. -2<br> e. -2 1/2<br> f.<br> 0
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!