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3 years ago

What is the product of the polynomials below?

Mathematics

1 answer:

Grace [21]3 years ago

8 0

The answer of the question is A

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HELP DUE AT MIDNIGHT TN

White raven [17]

Answer:

102

Step-by-step explanation:

These angles are congruent due to corresponding angles thm

3x + 21 = 6x - 60

3x - 6x = -60 - 21

-3x = -81

x = 27

3x + 21

3(27) + 21

81 + 21

102

8 0

3 years ago

Find: 1. three quartiles and 2. interquartile range (IQR).<br> 1, 3, 9, 12, 12, 14, 18

Alex_Xolod [135]

Q1=3 Q2[median]=12 Q3=14 and the IQR is 11

3 0

3 years ago

Please helpppp meeeee

aalyn [17]

Answer:

Step-by-step explanation: d I think

7 0

3 years ago

Read 2 more answers

Which term could be put into the blank to create a fully simplified polynomial written in standard form

podryga [215]

Answer:

$x^{2} y^{2}$

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

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

4 years ago