SOLUTION: Gina sold foam fingers for $5 each and Bracelets for $4 each. She sold a total of 210 items for a total of $965. How many of each item did Gina sell?
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Question 828625: Gina sold foam fingers for $5 each and Bracelets for $4 each. She sold a total of 210 items for a total of $965. How many of each item did Gina sell? Answer by TimothyLamb(4379) (Show Source):
You can put this solution on YOUR website! ---
x = fingers
y = bracelets
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x + y = 210
5x + 4y = 965
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copy and paste the above linear system in standard form into this matrix-method solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
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solution:
x = fingers = 125
y = bracelets = 85
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system matrix
1 1
5 4
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inverse of system matrix
-4 1
5 -1
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determinant of system matrix = -1
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