Mathematics, 30.01.2021 07:40 marahkotelman

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?

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Mrs Tham bought z bottles of oil at $7 each. She gave the cashier $50. [a]Find the change Mrs Tham...