Solve the logarithmic equation.log (4 + x) - log (x - 2) = log 3
A. ?
B. - 5
C. 5
D. 
Answer: C
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If possible, solve each system by an algebraic method (substitution or addition method). Otherwise, state that the problem has no solution or an infinite number of solutions.9x - 4y = 47-0.5x + 0.3y = -2.3
A. (4, 7) B. (7, 4) C. (7, 5) D. (6, 5)
For the following amicable pair, determine whether neither, one, or both of the members are happy, and whether the pair is a happy amicable pair.35,390,008 and 39,259,592
A. both; happy B. one; not happy C. neither; not happy D. one; happy
Solve the problem.A company knows that the unit cost C and the unit revenue R from the production and sale of x units are related by 
Find the rate of change of unit revenue when the unit cost is changing by 
and the unit revenue is $4000.
A. $238.30/unit B. $334.40/unit C. $280.00/unit D. $430.50/unit
Solve the system graphically. Do not use a calculator.
A. {(-2, 5)} B. {(-5, -2)} C. {(2, 5)} D. {(5, -2)}