Anne, Barbara, and Cathy enter a coffee shop. Anne orders two coffees, one juice, and two donuts and pays $7.50. Barbara orders one coffee and three donuts and pays $3.75. Cathy orders three coffees, one juice, and four donuts and pays $10.75. write out the equation need to solve this problem  use the Cramer's Rule to solve the equation from part 1 how much would Lori have to pay if she orders one coffee, two juices, and three donuts

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Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.