Simplify the expression.
+ 
A. 
B. 
C. 
D. 
Answer: D
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Perform the indicated operation.
- 
A. 
B. 
C. 
D. 
Translate to a system of two equations, then solve.The perimeter of a rectangle is 86 m. If the width were doubled and the length were increased by 8 m, the perimeter would be 140 m. What are the length and width of the rectangle?
A. Width 24 m, length 19 m B. Width 19 m, length 24 m C. Width 16 m, length 21 m D. Width 21 m, length 21 m
Use the Quotient Rule to simplify. All variables are nonzero.
A. 
B. x4
C. x8
D. x22
Solve the problem.Dmitri needs 5 liters of a 36% solution of sulfuric acid for a research project in molecular biology. He has two supplies of sulfuric acid solution: one is an unlimited supply of the 40% solution and the other an unlimited supply of the 30% solution. How many liters of each solution should Dmitri use?
A. 40% solution: 2 liters; 30% solution: 3 liters B. 40% solution: 3.5 liters; 30% solution: 1.5 liters C. 40% solution: 2.5 liters; 30% solution: 2.5 liters D. 40% solution: 3 liters; 30% solution: 2 liters