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
stiks02 [169]
3 years ago
9

What is the equation of a circle centered at (1,-4) and a diameter 18?

Mathematics
2 answers:
hoa [83]3 years ago
7 0

Answer:

(x - 1)² + (y + 4)² = 81

Step-by-step explanation:

Circle Formula: (x - h)² + (y - k)² = r²

(h, k) is the center

2r = d

Step 1: Find <em>r</em>

18 = 2r

r = 9

Step 2: Plug known variables into formula

(x - 1)² + (y + 4)² = 9²

Step 3: Evaluate

(x - 1)² + (y + 4)² = 81

jonny [76]3 years ago
7 0

Answer:

(x-1)^2 + (y+4)^2 = 81

Step-by-step explanation:

The equation of a circle can be written as

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

where ( h,k) is the center and r is the radius

The center is ( 1,-4)

and the radius is d/2 = 18/2 = 9

(x-1)^2 + (y- -4)^2 = 9^2

(x-1)^2 + (y+4)^2 = 81

You might be interested in
What is the slope function?
egoroff_w [7]

Answer:

y=mx+b

Step-by-step explanation:

6 0
3 years ago
Im kinda confused ;-;​
Ivan

Answer:

42-38

42 + (-38)

-38+42

Step-by-step explanation:

In all of these expressions, the 38 has to be negative because that is what you're taking away from the 48. When you have -(- it turns into a +.

In -42 + 38 the 42 is negative, but that is Emma's total amount so it's positive

With -42 -(-38) they did the just added those two together which would make the 42 still negative and the 38 positive.

THen with 42 + 38 the 38 is being subtracted from what she has so you would not add 38 to her total.

7 0
3 years ago
Read 2 more answers
A 400-g sample of a radioactive substance is placed in a chamber to be tested. After 3 h,
muminat

Answer:

You left out the quantity of grams remaining.

Step-by-step explanation:

3 0
3 years ago
$61.60 for parts and labor rate is $30.00 per hour total cost 136.60 how many hours will the job take? Write an equation and exp
cluponka [151]

Answer:

(136.60 - 61.60) / 30 = 2.5 hours

Step-by-step explanation:

First, subtract the cost of parts from the total: 136.60 - 61.60 = 75

Now you have the total labor cost. Divide by the hourly rate: 75 / 30 = 2.5

6 0
2 years ago
What is the Lcm of 28 and 32
lesantik [10]

Answer:

The lcm of 28 is 4

The lcm for 32 is also 4

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • A lecture hall contains $20$ chairs, all lined in a row. What is the number of ways that five chairs can be chosen, so that no t
    15·2 answers
  • Write the equation in slope-intercept form of the line that has a slope of -7/8 and contains the point (-4, 9).
    15·1 answer
  • How to write 18,165,411 in word form
    8·2 answers
  • Luerityilly CIUSS SECUMS UN SUNIUS
    6·2 answers
  • Find the first six terms of the sequence.<br> a = 1, an = 4.an-1 (7 points)
    11·1 answer
  • What is 2 3/12 minus 1 8/12 equal to?​
    9·2 answers
  • Will your career more important than anything else
    9·2 answers
  • What value of x makes the equation -4x – (-3 − 5x) = -3(2x − 8) true?
    15·1 answer
  • Please help! It’s late! (One question)
    7·1 answer
  • Is 144 a perfect square?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!