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julia-pushkina [17]
2 years ago
8

Use the financial database from "excel databases. Xls" on blackboard. Use total revenues, total assets, return on equity, earnin

gs per share, average yield, and dividends per share to predict the average p/e ratio for a company. Use excel to perform a forward selection regression analysis. Assume a 5% level of significance. Which independent variables are in the final model? select all that apply.
SAT
1 answer:
Darya [45]2 years ago
7 0

Answer:

dssdv

Explanation:svsvsv

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If the system of linear equations below has no solution, and a is a constant, what is the value of a?"A. -2 B. -½ C. 2 D. and 2
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Answer:

a = 6

Explanation:

If the system of equations has no solution, their graphs have the same slope.

1. Slope of first equation

\begin{array}{rcl}|\frac{1}{2}x - \frac{2}{3} y|& = & 7\\|3x - 4y| & = & 42\\3x - 4y & = & \pm42\\-4y & = & -3x \pm 42\\y & = & \frac{3}{4}x \mp \frac{42}{4}\\\\\text{Slope}& = & \dfrac{3}{4} \end{array}

2. Slope of second equation

\begin{array}{rcl}|ax - 8y| & = & 1\\ax - 8y & = & \pm 1\\-8y & = & -ax \pm 1\\y & = & \frac{a}{8}x\mp \frac{1}{8}\\\\\text{Slope} & = & \dfrac{a}{8}\\\end{array}

3. Value of a

\begin{array}{rcl}\dfrac{3}{4} & = & \dfrac{a}{8}\\\\a & = & \dfrac{24}{4}\\\\ & = & \mathbf{6}\\\end{array}

Check:

\begin{array}{rcrrcl}|\frac{1}{2}x - \frac{2}{3} y|& = & 7 & \qquad |6x - 8y| & = &1\\|3x - 4y| & = & 42 &|3x - 4y| &= &\frac{1}{2} & \\\end{array}\\\text{Both equations have the same slope}

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