If the rectangle has a fixed width of 300, it means that

where
and
are width and length, respetively.
So given the length
, the are would be

Answer:
Ok so T=time so a b and c would be 300 -10(a or b or c)
Step-by-step explanation:
I believe that choice A is the best answer out of those given above.
Hope this helps and please enjoy Brainly! -ZeusROX
I believe by the first equation they are referring two a representation of the total amount of money made up by the two types of coins. I found this to be 0.05x + 0.10y = 3.50
In my work I solved for the amount of each coin- I assume this is what the final step of your problem entails. If you need any help understanding/ I misinterpreted something please feel free to comment and ask :)
#5c coins or x= 36
#10c coins or y= 17
Answer:
1750
Step-by-step explanation:
Earns per week: $560
Total sales per week: 
Weekly commission on sales: 0.08
Total Earning per week: 

Simplifying this inequality:

Her sales must be at least $1750.