Solve the problem.John owns a hotdog stand. He has found that his profit is represented by the equation 
, where is x the number of hotdogs. How many hotdogs must he sell to earn the most profit?
A. 73 hotdogs
B. 30 hotdogs
C. 43 hotdogs
D. 60 hotdogs
Answer: B
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Fill in the blank with one of the words or phrases listed below.
Fractions that have the same denominator are called 
fractions.
A. least common denominator B. equivalent C. like D. least common multiple
Solve for x. Assume that a and b represent positive real numbers.x2 - a2 - 81 = 0
A. {
, - 
}
B. {a2 + 81, a2 - 81}
C. {
, - 
}
D. {
, - 
}
Solve the problem.A wildlife researcher is monitoring a black bear that has a radio telemetry collar with a transmitting range of 16 miles. The researcher is in a research station with her receiver and tracking the bear's movements. If we put the origin of a coordinate system at the research station, what is the equation of all possible locations of the bear where the transmitter would be at its maximum range?
A. x2 + y2 = 32 B. x2 + y2 = 256 C. x2 + y2 = 16 D. x2 - y2 = 16
Graph the system of inequalities.6y - x ? 8-y + 3x ? 6x ? 0
A. 
B. 
C. 
D. 