Question

Mrs Tan bought z bags of rice for $9 each. She gave the cashier $50. (a)Find the change Mrs Tan received in terms of z. (b)If z=4, how much change did Mrs Tan receive?

Answer 1

Answer:

(a) $50 - $9z

(b) $14

Step-by-step explanation:

(a) Let number of rice bags Mrs. Tan bought be "z"

    Money each bag cost = $9

    Money Mrs. Tan gave to the cashier = $50

    Money Mrs. Tan got back in terms of z = 50 - (9 x z)

                                                                                 = $50-$9z

(b) Let z=4

    Money each bag cost = $9

                                               = 9 x 4

                                               = 36

    Money Mrs. Tan gave to the cashier = $50

    Money Mrs Tan got back = $50 - $36

                                                              = $14