Write the phrase as a mathematical expression. Use x as the variable.One-third of a number added to the difference of the number and 6
A. 
B. 
x + (x - 6)
C. 
x + (6 - x)
D. 
Answer: B
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Graph the exponential function.y = e-x 
A. 
B. 
C. 
D. 
Solve using a system of two equations in two unknowns.Dmitri needs 5 liters of a 7% solution of sulfuric acid for a research project in molecular biology. He has two unlimited supplies of sulfuric acid solution: 5% solution and 10% solution. How many liters of each solution should Dmitri use?
A. 5% solution: 3 L, 10% solution: 2 L B. 5% solution: 3.5 L, 10% solution: 1.5 L C. 5% solution: 2.5 L, 10% solution: 2.5 L D. 5% solution: 2 L, 10% solution: 3 L
Calculate the perimeter for the given figure. Use 3.14 for ?. Round to hundredths if necessary.Parellelogram
A. 23 m B. 30 m C. 22 m D. 15 m
Shade the region of feasible solutions for the given constraints.2x + 3y ? 6 x - y ? 3x ? 1, y ? 0
A. 
B. 
C. 
D. 