Henry paid for his lunch and wrote this equation to represent the change he got back from the cashier.

20 – l = 14.5

which situation could be described by this equation?

a.
henry knows he paid $14.50 for lunch. he knows he got $20 back from the cashier. he does not know how much he paid the cashier.

b.
henry knows he gave the cashier $14.50. he doesn't know how much his lunch cost. he knows he got $20 back from the cashier.

c.
henry knows he gave the cashier $20. he does not know how much his lunch cost. he knows he got $14.50 back from the cashier.

d.
henry knows his lunch cost $20. he knows his change was $14.50. he does not know how much he gave the cashier.