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spayn [35]
2 years ago
11

I really need help

Mathematics
1 answer:
KengaRu [80]2 years ago
6 0
The answer should be
(x-10)²+(y+4)²=16


The equation of any circle is
(x – h)² + (y – k)² = r²

(h,k) is the center point and r is the radius
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If f(x)=-3x+6, what is the value of f(-3)?
11Alexandr11 [23.1K]
The answer would be f(x)= 15
4 0
3 years ago
Among 420 randomly selected employees at a company, the mean number of hours of overtime worked per month is 10 hours and the st
kari74 [83]

The margin of error of the random selection is 0.20

The given parameters are:

n = 420 --- the sample size

\sigma = 1.6 --- the standard deviation

\bar x = 10 --- the mean

\alpha = 99\% --- the confidence level.

The margin of error (E) is calculated as follows:

E = z \times \sqrt{\frac{\sigma^2}{n}}

So, we have:

E = z \times \sqrt{\frac{1.6^2}{420}}

E = z \times \sqrt{\frac{2.56}{420}}

The z-value for 99% confidence level is 2.576.

Substitute 2.576 for z

E = 2.576 \times \sqrt{\frac{2.56}{420}}

E = 2.576 \times \sqrt{0.006095}

Take square roots

E = 2.576 \times 0.0781

Multiply

E = 0.2012

Approximate

E = 0.20

Hence, the margin of error is 0.20

Read more about margin of error at:

brainly.com/question/14396648

8 0
2 years ago
Read 2 more answers
In Exercises 3 and 4, find the values of x and y <br> plz help!!!
jonny [76]

Answer:

x = 20°

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Step-by-step explanation:

The triangle given on close inspection, it is an equilateral triangle.

Each angle in an equilateral triangle is equal. Likewise, each side is equal.

Thus;

16 + y = 46

y = 46 - 16

y = 30

The triangle that has angle 80°, the other complete angle is 60° because it's an angle of an equilateral triangle.

Thus, the smaller angle there is;

180 - (80 + 60) = 40°

Because sum of angles in a triangle is 180°

Now, x + 40 = 60°

Since that's also an angle of an equilateral triangle.

x = 60 - 40

x = 20°

8 0
2 years ago
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Answer:

Step-by-step explanation:

This is simplest if we subtract the area of the missing rectangle from the area of a complete rectangle.

A=9(3+6+3)-2(6)

A=9(12)-12

A=108-12

A=96 cm^2

3 0
2 years ago
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Real world problem for 3x-15=10
WINSTONCH [101]
A group of men have x dollars each, then they all want to buy something that costs $15 dollars, they group their money and pay up, then they have $10 left, how much did each man start with?
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