| 1) Let x = the number of chairs,
y = the number of desks, z = the number of filing cabinets. x + y + z = 330 12x + 14 y + 15 z = 4500 x - z = 20
Set up a matrix, and use inverse matrices to find the answer.
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| x = 100, y = 150, z = 80 |
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| 2) Let x = Number of Cokes, y = number of donuts, z = the number of bags of m&m's.
x + 2y + z = 2.50
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| Set up a matrix and then use inverse matrices to
solve.
Coke is $1.25, donuts are $.25, and m&m's are $.75 Yes they have enough.
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