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Yanka [14]
1 year ago
13

The equation of a circle is (x - 4)2 + (y - 4)2 = 9. The point (4, 1) is on the circle.

Mathematics
1 answer:
Alika [10]1 year ago
3 0

Answer:

4

Step-by-step explanation:

the answer is 4 hope it helps

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A piano has 88 keys. Fifty-two of the keys are white.
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36

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88 - 52

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Estimate the probability that an Earthbound meteorite either disintegrates above or impacts with a body of water. Round to the n
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Answer:

0.71 is the answer

Step-by-step explanation:

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Describe the following sequence as arithmetic, geometric or neither. 2,4,8,12,14...
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Read 2 more answers
Please help answer A and B
Goshia [24]

Answer:

the answer is A

Step-by-step explanation:

4 0
2 years ago
What is the quadratic regression equation for the data set? ​ ​ ​ <br><br> PLEASEE HELP ME
Soloha48 [4]
You're trying to find constants a_0,a_1,a_2 such that \hat y=a_0+a_1\hat x+a_2{\hat x}^2. Equivalently, you're looking for the least-square solution to the following matrix equation.


\underbrace{\begin{bmatrix}1&6&6^2\\1&3&3^2\\\vdots&\vdots&\vdots\\1&9&9^2\end{bmatrix}}_{\mathbf A}\underbrace{\begin{bmatrix}a_0\\a_1\\a_2\end{bmatrix}}_{\mathbf x}=\underbrace{\begin{bmatrix}100\\110\\\vdots\\70\end{bmatrix}}_{\mathbf b}

To solve \mathbf{Ax}=\mathbf b, multiply both sides by the transpose of \mathbf A, which introduces an invertible square matrix on the LHS.

\mathbf{Ax}=\mathbf b\implies\mathbf A^\top\mathbf{Ax}=\mathbf A^\top\mathbf b\implies\mathbf x=(\mathbf A^\top\mathbf A)^{-1}\mathbf A^\top\mathbf b

Computing this, you'd find that

\mathbf x=\begin{bmatrix}a_0\\a_1\\a_2\end{bmatrix}\approx\begin{bmatrix}121.119\\-3.786\\-0.175\end{bmatrix}

which means the first choice is correct.
8 0
3 years ago
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