Answer:
a) Define x as # of quarters. Then, # of nickels = x + 5. b) Define y as # of nickels. Then, # of quarters = y - 5. c) # of quarters = 4, and # of nickels = 9. d) 4 < 5, so the answer is No.
Step-by-step explanation:
c) In units of cents, and the variable x, we have that 25x + 5(x+5) = 145, so that
25x + 5x + 25 = 145,
30x + 25 = 145,
30x = 120
x = 4 = # of quarters, and x+5 = 4+5=9 = # of nickels
