Simplify the expression. Write the result using positive exponents only.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Use duality to solve the problem.Minimizew = 4y1 + 2y2subject to:3y1 + 2y2 ? 60 4y1 + y2 ? 40 y1 ? 0, y2 ? 0
A. 48 B. 64 C. 66 D. 80
Mathematics
Find the limit.
A. 7 B. 3 C. 0 D. Does not exist
Mathematics
A welder grabs a handful of 6011 welding rods and another handful of Super Strength 100 welding rods. When the welder sees how many of each she has, she has 26 of the 6011 welding rods and 90 of the Super Strength 100 welding rods. What is the ratio of the 6011 welding rods to the Super Strength 100 welding rods?
A. 
B. 
C. 
D. 
E. 
Mathematics
Multiply and simplify.15 ? 
A. 
B. 
C. 16
D. 12
Mathematics