Answer:
The cost store owner pay for the pair of jeans is $42.
Explanation:
Given:
A store owner uses a selling price of 125% of the cost of an item.
If a pair of jeans has a sales price of $52.50.
Now, to find the cost price of the store owner pay for the pair of jeans.
Let the cost price of jeans be
![x.](https://img.qammunity.org/2021/formulas/mathematics/middle-school/mmi228653dkvma4dszwy75q6dvkduzr4zg.png)
Sell price of jeans =
![\$52.50.](https://img.qammunity.org/2021/formulas/mathematics/middle-school/5e3aulaurd2u37l1uanvxc5bdxpzarhxsl.png)
Now, to get the cost price of store owner pay for the pair of jeans:
As given the store owner uses a selling price of 125% of the cost of an item.
According to question:
![125\%\ of\ x=52.50](https://img.qammunity.org/2021/formulas/mathematics/middle-school/6a150s0i69j3sm8ng0iawzfnqjgwytu836.png)
![(125)/(100) * x=52.50](https://img.qammunity.org/2021/formulas/mathematics/middle-school/h8o2uoaa7q9tw2q0fo7pb8k0divkumtycx.png)
![1.25x=52.50](https://img.qammunity.org/2021/formulas/mathematics/middle-school/bei1oy20stgupxl1tkukernuvhrpcbvplq.png)
Dividing both sides by 1.25 we get:
![x=42.](https://img.qammunity.org/2021/formulas/mathematics/middle-school/dtv5xkhkw1jw64auussptyul5zi0nal0ic.png)
The cost price of jeans = $42.
Therefore, the cost store owner pay for the pair of jeans is $42.