Mathematics, 13.04.2021 01:00 elianagilbert3p3hh63
Elaine wants to purchase books. On Monday, she purchased 5 red bags of books and 9 blue bags of books for a total of 78 books. On Tuesday she purchased 7 red bags of books and 4 blue bags of books for a total of 49 books. How many books are in a red bag? How many in a blue bag?
5x+9y=78
7x+4y=49
if the system of equations on above represents what is happening in this problem, define x and y.
Let x= Let y=
What evidence from the system of equations helped you determine which was x and which was y?
Answers: 3
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Elaine wants to purchase books. On Monday, she purchased 5 red bags of books and 9 blue bags of book...
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