Mrs Tham bought z bottles of oil at $7 each. She gave the cashier $50. [a]Find the change Mrs Tham received in terms of z.
(b) If z = 3, how much change did Mrs Tham receive?

She bought 3 bottles of oil, and that would be a total of 21$ of oil so she should have recieved 29.00$ back so no change

Step-by-step explanation:

the answer for this question is 38

we'll this would mean that the dunk tank and the bounce house are the same for 20 hours because the 2 represents that the two activities, and the 20 represents the amount of hours they both are. so with this said, it means that the answer is c. the costs for a dunk tank and bounce house are the same for 20 hours.

c.the costs for a dunk tank and bounce house are the same for 20 hours.

hope this .