joanna went school supply shopping she spent $35.98 on notebooks and pencils notebooks cost $2.30 each and pencils cost $1.42 each she bough

Question

joanna went school supply shopping she spent $35.98 on notebooks and pencils notebooks cost $2.30 each and pencils cost $1.42 each she bought a total of 21 notebooks and pencils how many of each did she buy

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Faith 1 week 2021-10-05T04:43:18+00:00 1 Answer 0

Answers ( )

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    2021-10-05T04:44:39+00:00

    Joanna bought 7 notebooks and 14 pencils

    Step-by-step explanation:

    Step 1 :

    Let x denote the number of notebooks and y denote the number of pencils Joanna bought.

    Cost of one notebook = $ 2.30

    Cost of one pencil = $1.42

    Step 2 :

    Total of notebooks and pencils bought  = 21

    => x + y = 21 => y = 21-x

    Total cost of notebooks and pencils = $35.98

    => 2.3x + 1.42y = 35.98

    Substituting y = 21- x here , we have,

    2.3x + 1.42 ( 21-x) = 35.98

    2.3x + 29.82 – 1.42x = 35.98

    0.88 x = 6.16

    => x = 7

    y = 21-x = 21-7 = 14

    Step 3 :

    Answer :

    Joanna bought 7 notebooks and 14 pencils

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45:7+7-4:2-5:5*4+35:2 =? ( )