We know, nickel = 5 cents
& 1 dime = 10 cents,
So, money from nickel would be:= 5x
money from dime would be:= 10y
Total, money = 1000 cents ($10)
& You need to shade the area below the line for positive values of x and y.
By collecting all the datas from above, option A is your answer.
Hope this helps!