<PRE><B>Question 62117</B>
You bought 10 annuals and 4 perennials. Your total cost was $21. Alex bought 24 annuals and 3 perennials for a total for a total of $24. Petra bought 16 annuals, 2 perennials, and 3 seedlings for $25. How much did each item cost?
a. Set up a system of equations to solve for the prices of the items above. Define your variables as a, p, and s for the prices of annuals,perennials, and tree seedlings, respectively.
10a+4p+0s=21
24a+3p+0s=24
16a+2p+3s=25
AX=B
X=A^(-1)B
X=[0.71,3.47.2.22]
Price of annuals = 71 cents
Price of perennials = 3.47 dollars
Price of seedlings = 25 cents
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Cheers,
Stan H.</PRE>