Solve the equation.7x + 3 = 3x - 9
A. - 
B. 3
C. -12
D. -3
Answer: D
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Graph the function.y = 
cot 4x
A. 
B. 
C. 
D. 
Use algebraic and/or graphical methods to solve the inequality.
? 
A. -1 < x < 6 or x > 
B. -6 ? x ? 1 or x ? 
C. -6 < x < 1 or x ? 
D. -1 ? x ? 6 or x ? 
Solve by graphing.In one U.S. town the annual consumption y of beef (in kg per person) can be estimated by the linear equation 
where x is the number of years since 1975. Graph the equation and use the graph to estimate the beef consumption in the year 1995. 
A. 30 kg per person B. 13 kg per person C. 16 kg per person D. 10 kg per person
The Richter scale converts seismographic readings into numbers for measuring the magnitude of an earthquake according to this function M(x) = log 
, where x0 = 10-3.What is the magnitude of an earthquake whose seismographic reading is 6.5 millimeters at a distance of 100 kilometers from its epicenter? Round the answer to the nearest tenth.
A. 3.8 B. 2.4 C. 2.8 D. 812.9