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aleksley [76]
4 years ago
6

Geometry.

Mathematics
1 answer:
navik [9.2K]4 years ago
7 0
The equation of a circle with center (h, k) and radius r is

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

In this case, the center of the circle is (-3, 2), and the radius is 3.
You have h = -3, k = 2, r = 3

(x- (-3))^{2} + (y - 2)^{2} = 3^{2}

Simplifying, you get

(x + 3)^{2} + (y - 2)^{2} = 9
You might be interested in
The temperature of a cup of coffee varies according to Newton's Law of Cooling: dT dt equals negative k times the quantity T min
denis23 [38]

Answer:

  (b)  67

Step-by-step explanation:

A solution to the differential equation describing the temperature according to Newton's Law of Cooling could be written as ...

  T = (final temp) + (initial difference)×(decay factor)^t

where the decay factor is the fraction of change during 1 unit of time period t.

__

Here, the initial difference of 100-25 = 75 degrees decays to 90-25 = 65 degrees in 1 minute. So, the units of t are minutes, the decay factor is 65/75, the initial difference is 75 degrees, and the final temperature is 25 degrees. That lets us write the equation as ...

  T = 25 +75(65/75)^t

Then for t=4, the temperature is ...

  T = 25 +75(13/15)^4 ≈ 67.3 . . . . degrees

After 4 minutes the temperature of the coffee is about 67 degrees.

4 0
2 years ago
What value is equivalent to -30-2^3*3​
zepelin [54]

Answer:

-6

Step-by-step explanation:

-2 ^3x3 = 24

-30 + 24 = -6

8 0
2 years ago
Read 2 more answers
Whats the expression
Over [174]
The expression is: 5x + 6y - 3
5 0
3 years ago
(15, 31) is rotated 90 ° counterclockwise which coordinates gives me
dezoksy [38]

Answer:

(-31,15)

Step-by-step explanation:

Rotating 90 degrees clockwise is very simple:

(a,b) 90 degrees= (-b,a)

Very simple.

Just switch sides and add negative to the first term.

4 0
4 years ago
Joe needs to buy supplies for a birthday party. At the store, balloons cost $0.50 each and party hats each cost $1.25. If Joe wa
VladimirAG [237]

Answer:

0.50b+1.25h=20

Step-by-step explanation:

Let b be the number of balloons and h be number of party hats.

We have been given that balloons cost $0.50 each, so cost of b balloons will be 0.50b.

We are also told that party hats each cost $1.25, so cost of h party hats will be 1.25h.

Further, Joe wants to spend exactly $20 on the party supplies. We can represent this information in an equation as:

0.50b+1.25h=20

Therefore, the equation 0.50b+1.25h=20 represents the number of balloons ( b) and the number of party hats ( h) that Joe can buy spending exactly $20.

5 0
4 years ago
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