Joanna went school supply shopping. She spent $31.17 on notebooks and pencils. Notebooks cost $2.28 each and pencils cost $1.17 each. She bought a total of 20 notebooks and pencils. How many of each did she buy?
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she bought 7 notebooks and 13 pencils
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Answer:This is a assumption method
Step-by-step explanation:
assume all are notebooks
$2.28 times 20 =$45.60
$45.60 - $31.17 =$14.43
$2.28 - $1.17 = $1.11
$14.43 divide by $1.11 =13 (Notebooks)
20-13=7( pencils)
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