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
sattari [20]
3 years ago
11

Use completing the square to rewrite the equation in the form (x-h)^2 +(y-k)^2 = r^2. State the center (h, k) and radius r of th

e circle
2x^2 + 2y^2 + 4x + 8y - 20 = 0
Mathematics
1 answer:
Lisa [10]3 years ago
3 0

Answer:

The equation is (x + 1)^2 + (y + 2)^2 = 15

Center is at  (-1, -2) and radius = √15

Step-by-step explanation:

2x^2 + 2y^2 + 4x + 8y - 20 = 0

Divide through by 2:-

x^2 + y^2 + 2x + 4y - 10 = 0

x^2 + 2x + y^2 + 4x = 10

Completing the square on the x and y terms:-

(x + 1)^2 - 1 + (y + 2)^2 - 4 = 10

(x + 1)^2 + (y + 2)^2 = 10 + 1 + 4

(x + 1)^2 + (y + 2)^2 = 15    

You might be interested in
A triangle has two angles with measures of 90 and 20 degrees joined by a side with a length of 12 centimeters.
vichka [17]

Answer:  C

Step-by-step explanation:

We know that A and D will not be the correct answers. For A, it's only one 90 angles, but the questions said that has two angles. For D, it's two angles  : 90 and 12, but in the question, 12 is the length, not the angle.

The correct answer is C.

3 0
2 years ago
5 divided into 290 show work
Archy [21]
How many times does 5 go into 29? It can go into it 5 times which equals 25. Now what's 29 - 25? 4 is the answer then you see how many times can 5 go into 4, well it can't so then you bring the number 0 to make it 40. Now how many times can 5 go into 40? It can go into 40 eight times since 8x5=40 so the answer is 58
8 0
3 years ago
0.01x - 0.3y = 1
dusya [7]

Answer:

x-30y=100 and 10y=x-20

Step-by-step explanation:


8 0
3 years ago
Read 2 more answers
Suppose triangle TIP and triangle TOP are isosceles triangles. Also suppose that TI=5, PI=7, and PO=11. What are all the possibl
Ede4ka [16]
<h3>Two answers: 5, 7</h3>

====================================================

Explanation:

A drawing may be helpful to see what's going on. Check out the diagram below. This is one way of drawing out the two triangles. The locations of the points don't really matter, and neither does the the orientation of how you rotate things. What does matter is we have the right points connected to form the segments mentioned.

----------

For now, focus on triangle TIP only. In order to have this be isosceles, we must make TP = 5 or TP = 7.

If TP = 5, then it's the same length as TI.

If TP = 7, then it's the same length as PI.

In either case, we have exactly two sides the same length (the other side different) which is what it means for a triangle to be isosceles.

----------

Let's consider triangle TOP. For it to be isosceles, we must have two sides the same length. We already locked in TP to be either 5 or 7 in the previous section above. So there's no way that TP could be 11 units long to match up with PO = 11.

If TP = 5, then OT must also be 5 units long so that triangle TOP is isosceles.

If TP = 7, then OT = 7 for similar reasoning.

Either way, TP only has two choices on what it could be.

----------

In short, we basically just write the first two values given to us to get the two triangles to be isosceles. We can't use TP = 11 as it would make triangle TIP to be scalene (all sides are different lengths).

7 0
2 years ago
Solve 2x+y=7 for y what is y ?
masha68 [24]
You cant solve y but you can form an equation in terms of y
which is y=7-2x

if you were given another equation that has the term y and x than you can solve it.also that is a simultaneous equation.

Hope this helps,dont forget to put this as the brainliest answer if it does to help me out too. xD
6 0
3 years ago
Read 2 more answers
Other questions:
  • 3 1/3+(-2 1/4) + 1 5/6
    9·1 answer
  • Can anyone help? I’m confused:(
    14·2 answers
  • Hi yea, can you guys please help me on these my teacher literally doesn’t teach us!
    8·1 answer
  • Which notation best represents the phrase “at least 24”?
    12·2 answers
  • Rob buy 6 tickets to the basketball game he pays $8.50 for parking. His total cost is $40.54. What is the cost of each ticket?
    14·1 answer
  • The mean temperature for the first 4 days in January was 8°C.
    12·1 answer
  • Which unit rate corresponds to the proportional relationship shown in the graph? Drag and drop the answer into the box to match
    9·2 answers
  • Help so i can go please if you answer i dont know or stuff like that
    12·1 answer
  • A computer and printer cost a total of 950$ The cost of the computer is three times the cost of the printer. Find the cost of ea
    11·1 answer
  • X/6&gt;-8 . Can you exsplain to me how you do this answer for my math class
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!