Solve and check.
= 
A. x = - 
B. x = - 6
C. x = 6
D. x = 1
Answer: C
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A. 8,000,000 B. 8,000,000,000,000 C. 80,000,000 D. 800
Use the two steps for solving a linear programming problem to solve the problem.A doctor has told a sick patient to take vitamin pills. The patient needs at least 28 units of vitamin A, at least 7 units of vitamin B, and at least 20 units of vitamin C. The red vitamin pills cost 
each and contain 6 units of A, 1 unit of B, and 2 units of C. The blue vitamin pills cost 
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Compare the decimal numbers, and insert <, >, or = to form a true statement.0.31 
0.32
A. = B. > C. <
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