Simplify the expression.-(-8.2)
A. 8.2
B. 0
C. -8.2
D. -1
Answer: A
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Solve the problem.The price p of a certain product and the quantity sold x obey the demand equation p = - 
x + 200, 0 ? x ? 300. Suppose that the cost C of producing x units is C = 
+ 800. Assuming that all items produced are sold, find the cost C as a function of the price p.
What will be an ideal response?
Evaluate the expression using the values given in the table.(f?g)(3)
A. 4 B. Undefined C. 3 D. 9
Find the solution set of the system.
a. 
b. 
c. 
d. 
Solve.Dmitri needs 7 liters of a 24% 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 21% solution and the other an unlimited supply of the 28% solution. How many liters of each solution should Dmitri use?
A. 21% solution: 3 liters; 28% solution: 4 liters B. 21% solution: 4 liters; 28% solution: 3 liters C. 21% solution: 3.5 liters; 28% solution: 3.5 liters D. 21% solution: 4.5 liters; 28% solution: 2.5 liters