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3 years ago

Do y’all know this one and if you do can you help me out please

Mathematics

2 answers:

Igoryamba3 years ago

7 0

Answer:

G. Point B

Step-by-step explanation:

The two numbers closest to √140 are 11 and 12.

The squares would be 121, and 144.

140 is closer to 144, so the answer will be Point B.

Alborosie3 years ago

5 0

Point b..................

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Answer:

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Divide both sides by sin A × sin C to get A/sin A = C/sin C

Step-by-step explanation:

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3 years ago

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View attachment

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3 years ago

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3 years ago

What is the quadratic regression equation for the data set? <br><br> PLEASEE HELP ME

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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.

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4 years ago

The angles below are supplementary. What is the value of x? (5 points)

Mademuasel [1]

Answer:

Step-by-step explanation:

As the angles are supplementary, they sum up to 180

Hence, 3x+40+80=180

3x+120=180

3x=60

x=20

6 0

4 years ago

Read 2 more answers