Answer:
Option A is the correct choice.
Explanation:
Let d be the number of boxes of duck calls and t be the number of boxes of turkey calls.
We have been given that a company sells boxes of duck calls for $35 and boxes of turkey calls (t) for $45, so the revenue earned from selling d boxes of duck and t boxes of turkey call will be 35d and 45t respectively.
Further, the company plan to make $300. We can represent this information as:
![35d+45t=300...(1)](https://img.qammunity.org/2020/formulas/mathematics/high-school/ze3tksh5yeijtn876bntwsc6owmaasgkeq.png)
We are also told that they make batches of duck calls that fill 6 boxes and batches of turkey calls that fill 8 boxes. the company only has 42 boxes. We can represent this information as:
![6d+8t=42...(2)](https://img.qammunity.org/2020/formulas/mathematics/high-school/xl87vr17qeqilvo413m4kdl54hlpmri63a.png)
![6d=42-8t...(2)](https://img.qammunity.org/2020/formulas/mathematics/high-school/83yrfd90ew5mg5m8c9nwdoq3888fpr7a5m.png)
Therefore, our desired system of equation will be:
![35d+45t=300...(1)](https://img.qammunity.org/2020/formulas/mathematics/high-school/ze3tksh5yeijtn876bntwsc6owmaasgkeq.png)