Provide an appropriate response.Identify the values for which the rational expression 
is undefined.
A. a = -3
B. a = -9
C. a = 9
D. a = 3
Answer: A
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Simplify the expression.7a - 4a + 3
A. 11a + 3 B. 3a + 3 C. 6a D. -3a + 3
Identify the opposite of the number. 10
A. 0
B. -10
C. 
D. 10
Solve the problem.Persons taking a 30-hour review course to prepare for a standardized exam average a score of 620 on that exam. Persons taking a 70-hour review course average a score of 757. Find a linear function S(t), which fits this data, and which expresses score as a function of time.
A. S(t) = -3.425t + 517.25 B. S(t) = 3.0825t + 521.25 C. S(t) = 3.0825t - 521.25 D. S(t) = 3.425t + 517.25
Solve the problem.At Allied Electronics, production has begun on the X-15 Computer Chip. The total cost function is given by 
and the total profit function is given by 
, where x represents the number of boxes of computer chips produced. The total revenue function, R(x), is such that 
. Find R(x).
A. R(x) = 39x - 0.6x2 B. R(x) = 40x + 0.3x2 C. R(x) = 40x - 0.3x2 D. R(x) = 42x - 0.3x2