We know, nickel = 5 cents
& 1 dime = 10 cents,
So, money from nickel would be:= 5x
money from dime would be:= 10y
Total, money = 2000 cents ($20)
& You need to shade the area below the line for positive values of x and y.
By collecting all the datas from above, option C is your answer.
Hope this helps!
The two sides and two top angles are identical so the two bottom halves are the same
18 -2r = 4R
Add 2r to both sides
18 = 6r
Divide both sides by 6
R = 3
The answer is A. 3