Solve the problem.The length and width of a rectangle must have a sum of 100 feet. Find the dimensions of the rectangle whose area is as large as possible.
A. length 50 ft; width 150 ft
B. length 49 ft; width 51 ft
C. length 50 ft; width 50 ft
D. length 
ft; width 
ft
Answer: C
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Find the following. Assume that letters can represent any real number.
A. 
B. 
C. 2a + b
D. 
Evaluate the expression.
A. 336 B. 6720 C. 20,160 D. 56
Solve.Business people are concerned with cost functions, revenue functions, and profit functions. Suppose the revenue R(x) for x units of a product can be described by R(x) = 350x, and the cost C(x) can be described by C(x) = 2700 + 180x. Find the profit P(x) for x units.
A. P(x) = 170x + 2700
B. P(x) = 530x - 2700
C. P(x) = 
- 2700
D. P(x) = 170x - 2700
Identify the property illustrated by the statement. Assume all variables represent real numbers.
? (a + 2) = 1, if a + 2 ? 0
A. Inverse B. Closure C. Distributive D. Identity