In​ 2009, a diabetic express company charged ​$38.85 for a vial of type A insulin and ​$30.34 for a vial of type B insulin. If a total of ​$

Question

In​ 2009, a diabetic express company charged ​$38.85 for a vial of type A insulin and ​$30.34 for a vial of type B insulin. If a total of ​$1695.71 was collected for 50 vials of​ insulin, how many vials of each type were​ sold?
The number of vials of type A insulin sold were ___ and the number of vials of type B insulin sold were ____

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RobertKer 5 years 2021-08-27T19:19:03+00:00 1 Answers 34 views 0

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  1. trungdung22
    0
    2021-08-27T19:20:26+00:00
    Reply

    Answer:

    The number of vials of type A insulin sold were _21__ and the number of vials of type B insulin sold were __29__.

    Step-by-step explanation:

    Let a = number of type A vials.

    Let b = number of type B vials.

    38.85a + 30.34b = 1695.71

    a + b = 50

                38.85a + 30.34b = 1695.71

    (+)        -38.85a – 38.85b = -1942.50

    —————————————————

                                   -8.51b = -246.79

    b = 29

    a + b = 50

    a + 29 = 50

    a = 21

    Answer: The number of vials of type A insulin sold were _21__ and the number of vials of type B insulin sold were __29__.

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