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
pogonyaev
3 years ago
9

What is the radius of a circle whose equation is x2 + y2 – 10x + 6y + 18 = 0?

Mathematics
2 answers:
antoniya [11.8K]3 years ago
5 0
You can do this by completing the square on x and y terms:

  x^ - 10x + y^2 + 6y + 18 = 0

  (x - 5)^2 -25 + (y + 3)^2 - 9 + 18 = 0

  (x - 5)^2  + (y + 3)^2 = -18 + 9 + 25  =  16


so radius = sqrt16  = 4 answer
chubhunter [2.5K]3 years ago
5 0

Answer:

radius = 4

Step-by-step explanation:

the radius of a circle whose equation is x^2 + y^2 - 10x + 6y + 18 = 0

write the equation in center radius form

(x-h)^2+(y-k)^2= r^2

Use completing the square method, take the coefficient of x  and y . then divide it by 2 and then square it. Add it on both sides

x^2- 10x+ y^2 + 6y + 18 = 0

(x^2- 10x+25)+ (y^2 + 6y+9) + 18 = 25+9

(x-5)^2+ (y+3)^2 + 18 = 25+9

Subtract 18 on both sides

(x-5)^2+ (y+3)^2=16

radius r^2=16

Take square root on both sides

radius r= 4

You might be interested in
You purchase a $220 airline ticket. You have a discount code to receive 10% off. There is a 10.5% service charge added to the to
weeeeeb [17]
Answer should be $174.91? if that isnt an option tell me and i will regroup
4 0
3 years ago
After flying between two black holes, our engines have been a bit janky. The probability of one of any of our 8 power couplings
otez555 [7]

Answer:

Step-by-step explanation:

We would apply the formula for binomial distribution. It is expressed as

P(x = r) = nCr × q^(n - r) × p^r

Where

p represents probability of success

q represents probability of failure.

n represents number of sample.

From the information given,

p = 10% = 10/100 = 0.1

q = 1 - q = 1 - 0.1 = 0.9

n = 8

1)The probability that none fails is

P(x = 0) = 8C0 × 0.9^(8 - 0) × 0.1^0

P(x = 0) = 0.43

2) The probability that one fails is

P(x = 1) = 8C1 × 0.9^(8 - 1) × 0.1^1

P(x = 1) = 0.38

3) The probability that four fails is

P(x = 4) = 8C4 × 0.9^(8 - 4) × 0.1^4

P(x = 4) = 0.0046

3) The probability that six fails is

P(x = 6) = 8C6 × 0.9^(8 - 6) × 0.1^6

P(x = 6) = 0.00002268

4) The probability that eight fails is

P(x = 8) = 8C8 × 0.1^(8 - 8) × 0.1^8

P(x = 8) = 0.00000001

5 0
3 years ago
A customer left a 15% tip for a meal that cost $64. What was the total amount the customer paid for the meal and tip?
Inessa05 [86]

Answer:

73.6

Step-by-step explanation:

64x15%=9.6

9.6+64=73.6

4 0
2 years ago
Last year there were 520 students enrolled at Olsen Middle School . This year there are 572 students enrolled. What is the perce
RSB [31]

Answer:

10%

Step-by-step explanation:

We have procent:

520 —-> 100%

572 ——> x%

So, it is:

520*x=572*100

X=57200/520=110%

110%-100%=10%

6 0
2 years ago
Estimate by rounding both numbers to tens and then multiplying.<br> 22 x 47 is approximately
Diano4ka-milaya [45]

Answer:

the answer is 1060

Step-by-step explanation:

1064 rounded by tens is 1064

8 0
3 years ago
Read 2 more answers
Other questions:
  • There is only one city in Delaware county and that is dunston. The population of dunston is 6549. There are 43118 people living
    7·1 answer
  • Ginny is studying a population of frogs. She determines that the population is decreasing at an average rate of 3% per year. Whe
    8·2 answers
  • A bag contains 9 marbles: 2 are green, 3 are red, and 4 are blue. Laura chooses a marble at random, and without putting it back,
    7·2 answers
  • Can someone help me please asap because I'm late with this and I need help with this down below
    9·1 answer
  • Please help!<br> What is g(f(4))=(g o f)(-2)=?<br> A.21<br> B.23<br> C.25<br> D.27
    6·1 answer
  • Can someone explain the snake method, I don't understand how to do it
    13·2 answers
  • Eight plus four times a number is greater than five times the number
    7·1 answer
  • Two friends visited a taffy shop. Annie bought 9 pounds of strawberry taffy and 10 pounds of banana taffy for $103. Next, Rob bo
    12·1 answer
  • 5. In the figure Find X (In the picture) (giving points to best answer/brainlest)​
    13·1 answer
  • Describe the steps for copying a line segment.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!