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MissTica
3 years ago
14

What is the equation of the circle that has a center at (-3, 1) and a radius of 5? A) (x + 3)2 + (y - 1)2 = 5 B) (x - 3)2 + (y +

1)2 = 5 C) (x + 3)2 + (y - 1)2 = 25 D) (x - 3)2 + (y + 1)2 = 25
Mathematics
1 answer:
Gnoma [55]3 years ago
7 0

Answer:

C

Step-by-step explanation:

The vertex form of the equation of a circle is (x-h)^2 + (y-k)^2 = r^2 where (h,k) is the center of the circle and r is the radius. This means that for the circle with center (-3,1) and radius 5 substitute into the vertex form these values. Substitute h = -3, k= 1, and r = 5. The equation becomes (x--3)^2 + (y-1)^2 = 5^2. This simplifies to (x+3)^2 + (y-1)^2 = 25. The solution is C.

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Aliun [14]
Answer:
Mean Absolute Deviation (MAD): 1.6
5 0
2 years ago
I need help. Please ​
GREYUIT [131]

Answer:

A=5 units squared

Step-by-step explanation:

A=1/2(l*w)

A=1/2(5*2)

A=1/2(10)

A=5

3 0
3 years ago
Need help rn please?/..Thank you. Multiple step equation
liubo4ka [24]

Answer:

The answer (using BEDMAS) is 27

Step-by-step explanation:

The equation 9 x [(18+2) ÷ 5 - 1] is solved using BEDMAS or PEDMAS

First solve the smaller bracket

18 + 2 = 20

So then it becomes 9 x [20 ÷ 5 - 1]

Do the division inside the bracket next

20 ÷ 5 = 4

Then it becomes 9 x [4 - 1]

Do then subtraction within the bracket

4 - 1 = 3

Then it becomes 9 x 3

Finally solve 9 x 3 which equals 27

5 0
3 years ago
An apple farm claims that the average weight of all their apples is 8oz. A sample of 20 apples were picked that had a mean of 7.
Nimfa-mama [501]

Answer:

The mean apple weight is different from 8oz

Step-by-step explanation:

Claim : An apple farm claims that the average weight of all their apples is 8oz.

H_0:\mu \neq 8\\H_a:\mu = 8

n = 20

Standard deviation =s = 0.95

Since n < 30

So we will use t-test

x = 7.77

t =\frac{x-\mu}{\frac{s}{\sqrt{n}}}

Substitute the values :

t =\frac{7.77-8}{\frac{0.95}{\sqrt{20}}}

t =−1.0827

Since we are not given the significance level

So, we will take 5%

So,α = 0.05

Degree of freedom = df = n-1 = 20-1 = 19

So, using t table

t_{\frac{\alpha}{2} , df}=2.093

Since t critical > t statistic

So, we accept the null hypothesis.

So, The mean apple weight is different from 8oz

5 0
3 years ago
A beach erodes at a rate of 2cm per year. At this rate, what amount is it eroding in millimeters per hour
worty [1.4K]

The amount eroded at millimetre per hour is 0.002283

In order to determine the answer, take the following steps :

1. determine how many hours are in a year

there are 24 hours in a day

There are 365 days in a year

Number of hours in a year = number of days in a year x number of hours in a day

24 x 365 = 8760 hours

2. convert centimetre to millimetre

1 cm = 10mm

2cm x 10 = 20mm

3. Amount eroded per hour in millimetres = amount eroded per year / total number of hours in a year

20 / 8760 = 0.002283 millimetre / hour

To learn more, please check : brainly.com/question/13118179?referrer=searchResults

8 0
3 years ago
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