types of food available, and each type contains the follow- ing amounts of these nutrients per ounce. Туре А Туре В Туре С Folic acid (mg) Choline (mg) Inositol (mg) 3 4 3 (a) Find the inverse of the matrix 3 1 3 4 2 4 3 2 4 and use it to solve the remaining parts of this problem. (b) How many ounces of each food should the nutritionist feed his laboratory rats if he wants their daily diet to contain 10 mg of folic acid, 14 mg of choline, and 13 mg of inositol? (c) How much of each food is needed to supply 9 mg of folic acid, 12 mg of choline, and 10 mg of inositol? (d) Will any combination of these foods supply 2 mg of folie acid, 4 mg of choline, and 11 mg of inositol? 344 522

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Equations and Inequations

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.