Translate the phrase to an algebraic expression. Use x to represent "a number."Multiply a number by -15.
A. x ÷ (-15) or 
B. -15 + x
C. (-15) ÷ x or 
D. x ? (-15) or -15x
Answer: D
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For right triangle ABC, m
= 90°. If b = 8 and c = 12, find cos B (or cos 
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Solve the minimization problem by using the simplex method to solve the dual problem.Daniel decides to feed his cat a combination of two foods: Max Cat and Mighty Cat. He wants his cat to receive four nutritional factors each month. The amounts of these factors (a, b, c, and d) contained in one bag of each food are shown in the chart, together with the total amounts needed. 
The costs per bag are $40 for Max Cat and $36 for Mighty Cat. How many bags of each food should be blended to meet the nutritional requirements at the lowest cost? What is the minimum cost?
A. Minimum cost = $624 when he blends 12 bags of Max Cat and 4 bags of Mighty Cat. B. Minimum cost = $672 when he blends 6 bags of Max Cat and 12 bags of Mighty Cat. C. Minimum cost = $712 when he blends 16 bags of Max Cat and 2 bags of Mighty Cat. D. Minimum cost = $720 when he blends 0 bags of Max Cat and 20 bags of Mighty Cat.
Use an inequality symbol to write the statement.2 is greater than y.
A. 2 > y B. 2 < y C. 2 ? y D. 2 ? y