Select the correct answer.

Regina has \[tex]$500 in a savings account. She wants to purchase a washer and dryer set for \$[/tex]1,600, and she takes out an interest-free loan at the store. Her monthly payment is \[tex]$134. Regina saves an extra \$[/tex]75 each month in addition to her loan payments. What system of equations could Regina use to determine when she will have enough money to completely pay for the washer and dryer set?

A.
[tex]\[
y = 134x + 500 \\
y = 1,600 - 100x
\][/tex]

B.
[tex]\[
y = 75x + 500 \\
y = 1,600 - 134x
\][/tex]

C.
[tex]\[
\begin{aligned}
y &= 500x + 75 \\
y &= 1,600 - 134x
\end{aligned}
\][/tex]

D.
[tex]\[
\begin{aligned}
y &= 1,600x + 134 \\
y &= 75x - 500
\end{aligned}
\][/tex]



Answer :

Let's analyze each choice to determine the correct system of equations that accurately represents Regina's financial situation.

1. Initial Setup:

- Regina's initial savings: \[tex]$500 - Cost of the washer and dryer: \$[/tex]1,600
- Monthly loan payment: \[tex]$134 - Additional savings each month: \$[/tex]75

2. Understanding the Equations:
- The first equation should represent Regina's growing savings over time, taking into account her additional monthly savings.
- The second equation should represent the remaining balance on the washer and dryer loan after each monthly payment.

### Evaluating Each Option

Option A:
[tex]\[ \begin{aligned} y & = 134x + 500 \\ y & = 1,600 - 100x \end{aligned} \][/tex]

- First equation [tex]\(y = 134x + 500\)[/tex]: This means Regina saves \[tex]$134 each month plus an initial \$[/tex]500 saving. However, this doesn't include her additional savings of \[tex]$75 each month - Incorrect. - Second equation \(y = 1,600 - 100x\): This attempts to represent her remaining loan balance, but the monthly deduction incorrectly uses 100 instead of 134 - Incorrect. Option B: \[ \begin{aligned} y & = 75x + 500 \\ y & = 1,600 - 134x \end{aligned} \] - First equation \(y = 75x + 500\): This correctly includes her initial savings of \$[/tex]500 and her extra savings of \[tex]$75 each month - Correct. - Second equation \(y = 1,600 - 134x\): This correctly represents the remaining cost of the washer and dryer after deducting the monthly payment of \$[/tex]134 - Correct.

Option C:
[tex]\[ \begin{aligned} y & = 500x + 75 \\ y & = 1,600 - 134x \end{aligned} \][/tex]

- First equation [tex]\(y = 500x + 75\)[/tex]: This incorrectly implies that she saves \[tex]$500 each month plus a one-time \$[/tex]75. This is not consistent with her actual additional savings each month - Incorrect.
- Second equation [tex]\(y = 1,600 - 134x\)[/tex]: This correctly represents the remaining loan balance - Correct.

Option D:
[tex]\[ \begin{aligned} y & = 1,600x + 134 \\ y & = 75x - 500 \end{aligned} \][/tex]

- First equation [tex]\(y = 1,600x + 134\)[/tex]: This doesn't align with any logical financial scenario in this context as it implies a massive monthly saving which is unrealistic - Incorrect.
- Second equation [tex]\(y = 75x - 500\)[/tex]: This incorrectly represents a negative initial balance and savings while the monthly saving is correctly included - Incorrect.

### Conclusion:
After evaluating each option and comparing with Regina's financial details, Option B correctly represents Regina’s savings growth and the remaining loan balance:

[tex]\[ \begin{aligned} y & = 75x + 500 \\ y & = 1,600 - 134x \end{aligned} \][/tex]

Thus, the correct answer is B.