Welcome to Westonci.ca, your go-to destination for finding answers to all your questions. Join our expert community today! Our platform provides a seamless experience for finding reliable answers from a knowledgeable network of professionals. Join our Q&A platform to connect with experts dedicated to providing accurate answers to your questions in various fields.

Select the correct answer.

Estimate the solution to the following system of equations by graphing.

[tex]\[
\begin{array}{l}
3x + 6y = 16 \\
6x - 4y = 0
\end{array}
\][/tex]

A. [tex]\(\left(\frac{1}{3}, -\frac{1}{2}\right)\)[/tex]

B. [tex]\(\left(\frac{4}{3}, 1\right)\)[/tex]

C. [tex]\(\left(-\frac{1}{2}, -\frac{1}{4}\right)\)[/tex]

D. [tex]\(\left(\frac{1}{4}, \frac{4}{3}\right)\)[/tex]


Sagot :

To solve the system of equations by graphing, we need to find the intersection point of the lines represented by the two equations:
[tex]\[ \begin{array}{l} 1. \quad 30 + 6y = 16 \\ 2. \quad 6x - 4y = 0 \end{array} \][/tex]

Let's simplify each equation step by step.

### Simplify Equation 1:
[tex]\[ 30 + 6y = 16 \][/tex]
Subtract 30 from both sides:
[tex]\[ 6y = 16 - 30 \][/tex]
[tex]\[ 6y = -14 \][/tex]
Divide both sides by 6:
[tex]\[ y = \frac{-14}{6} = \frac{-7}{3} \][/tex]

### Simplify Equation 2:
[tex]\[ 6x - 4y = 0 \][/tex]
Add [tex]\(4y\)[/tex] to both sides:
[tex]\[ 6x = 4y \][/tex]
Divide both sides by 6:
[tex]\[ x = \frac{4}{6} y \][/tex]
[tex]\[ x = \frac{2}{3} y \][/tex]

### Substitute [tex]\( y = \frac{-7}{3} \)[/tex] into [tex]\( x = \frac{2}{3} y \)[/tex]:
[tex]\[ x = \frac{2}{3} \left(\frac{-7}{3}\right) \][/tex]
[tex]\[ x = \frac{2 \cdot -7}{3 \cdot 3} \][/tex]
[tex]\[ x = \frac{-14}{9} \][/tex]

Thus, the solution to the system of equations is:
[tex]\[ x = \frac{-14}{9}, \; y = \frac{-7}{3} \][/tex]

Now, let's match this solution with the given answer choices:

A. [tex]\(\left(\frac{1}{3}, -\frac{1}{2}\right)\)[/tex] - This does not match the solution.
B. [tex]\(\left(\frac{4}{3}, \frac{1}{1}\right)\)[/tex] - This does not match the solution.
C. [tex]\(\left(-\frac{1}{2}, -\frac{1}{4}\right)\)[/tex] - This does not match the solution.
D. [tex]\(\left(\frac{1}{4}, \frac{4}{3}\right)\)[/tex] - This does not match the solution.

None of the given options match the solution [tex]\(\left(\frac{-14}{9}, \frac{-7}{3}\right)\)[/tex]. Therefore, it appears that the correct solution is not listed among the provided options.