OpenStax, Algebra and Trigonometry 2e §11.7 Solving Systems with Inverses · Exercise 59 · Linear Algebra · Matrices
Solving Systems with Inverses · Exercise 59
Write a system of equations that represents the situation. Then, solve the system using the inverse of a matrix.
The nursing club held a bake sale to raise money and sold brownies and chocolate chip cookies. They priced the brownies at $1 and the chocolate chip cookies at $0.75. They raised $700 and sold 850 items. How many brownies and how many cookies were sold?
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OpenStax, Algebra and Trigonometry 2e · §11.7 Solving Systems with Inverses · Exercise 59
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