Interesting problem.
First - let's figure cost of each uniform at purchase.
3,000/40 = $75 each
When some uniforms were returned at $40 - there was a difference of $35 in what they paid and what they rec'd in return. ($75 - 35 = $40)
The 'x' in x^2-7x-30=0 is 4.
<span>-0.411764706 - 1.35294118 i</span>
Answer:C consumer price index
Step-by-step explanation:
