Question

Winston pays $8 for a burger, an order of fries, and a soft drink. Tia buys 2 burgers and a soft drink for $10.50. George buys 2 orders of fries, a burger, and 2 soft drinks for $12. Let x, y, and z represent the cost of a burger, an order of fries, and a soft drink, respectively. If A is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, A-1, and the solution matrix, X, of the system of equations.

Answer 1

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