Answer:
Last week her sales were $4500.
Explanation:
Given:
Danielle earns a 7.25% commission on everything she sells at the electronics store where she works.
She also earns a base salary of $750 per week.
Her total earnings for the week were $1,076.25.
Now, to find her sales last week.
Let the sales of last week be
![x.](https://img.qammunity.org/2021/formulas/mathematics/middle-school/mmi228653dkvma4dszwy75q6dvkduzr4zg.png)
Base salary = $750.
Total earnings = $1076.25.
So, we deduct the base salary from the total earnings first:
![1076.25-750](https://img.qammunity.org/2021/formulas/mathematics/high-school/ppdnuxum6rvl7bq1dy375ruaf9ztpiqn8e.png)
![=326.25.](https://img.qammunity.org/2021/formulas/mathematics/high-school/sup9uypzotbuhoge222ub7by4sp7uwg8nx.png)
Thus, the rest of the earnings is $326.25 which is the 7.25% commission on sales.
Now, to get the sales of last week we put an equation:
![7.25\%\ of\ x=326.25](https://img.qammunity.org/2021/formulas/mathematics/high-school/4ppmvtaju8pr4cxc7ypv25fjswb4m4yl0a.png)
![(7.25)/(100) * x=326.25](https://img.qammunity.org/2021/formulas/mathematics/high-school/dj6z3ubzb6ezql39a3vc5xq74jf30qkowo.png)
![(7.25x)/(100) =326.25](https://img.qammunity.org/2021/formulas/mathematics/high-school/1jbpawv76ixomcje5o7h7jx75wiis6nx61.png)
Multiplying both sides by 100 we get:
![7.25x=32625](https://img.qammunity.org/2021/formulas/mathematics/high-school/bt1vpsovgkzo3l9ilimo7dlb5d4m5b980k.png)
Dividing both sides by 7.25 we get:
![x=4500.](https://img.qammunity.org/2021/formulas/mathematics/high-school/nxtcv1rnq8tfmoa4cgy2bxx4vo2r2fc968.png)
The sales of last week = $4500.
Therefore, last week her sales were $4500.