Solve the system of equations by the substitution method.
A. {(-2, -4)}
B. {(-4, 2)}
C. {(-3, -2)}
D. {(-4, -2)}
Answer: D
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Solve.10,500 college students were asked to name their favorite sport. Of this group, 
said basketball, 
said soccer, 
said baseball, 
said they had no favorite sport, and the remainder said volleyball. How many named each sport? 
A. Basketball: 3,500 Soccer: 2,100 Baseball: 1,800 Volleyball: 2,575 None: 525 B. Basketball: 3,500 Soccer: 2,100 Baseball: 1,750 Volleyball: 2,635 None: 515 C. Basketball: 3,500 Soccer: 2,100 Baseball: 1,750 Volleyball: 2,625 None: 525 D. Basketball: 3,500 Soccer: 2,050 Baseball: 1,750 Volleyball: 2,675 None: 525
Solve the problem.Find the derivative of the function 
at the point 
in the direction in which the function decreases most rapidly.
A. - 
B. - 
C. - 
D. - 
For the given function, find the indicated function value, if it exists. If the value does not exist, answer "Does not exist".For f(x) = 
, find f(13).
A. 
B. 2
C. 
D. 
Find the nth term an of the geometric sequence.7, -14, 28, -56, 112, . . .
A. an = (7)(-2)n-1 B. an = a1 - 2n C. an = (7)(-2n) D. an = (7)(-2)n