Solve the problem.The two solutions of the equation x2 = x + 1 are
A. 1 and ?.
B. ? and -1/?.
C. ? and -?.
D. ? and ?2.
E. none of these
Answer: B
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Write the function in the form y = f(u) and u = g(x). Then find dy/dx as a function of x.y = (-3x + 11)6
A. y = 6u + 11; u = x6; 
= -18x5
B. y = u6; u = -3x + 11; 
= -18(-3x + 11)5
C. y = u6; u = -3x + 11; 
= 6(-3x + 11)5
D. y = u6; u = -3x + 11; 
= -3(-3x + 11)6
Find the exact value of y, or state that y is undefined.y = cos-1 (-4)
A. ? B. undefined C. 0 D. -4
Solve. Write the fractions in simplest form.A company employs 144,000 employees worldwide. About 46,800 employees work in the United States. What fraction of the employees work in the United States?
A. 
B. 
C. 
D. 
Solve the problem.A woman works out by running and swimming. When she runs, she burns 8 calories per minute. When she swims, she burns 10 calories per minute. She wants to burn at least 400 calories in her workout. Graph an inequality that describes the situation. Let x represent the number of minutes running and y the number of minutes swimming. Because x and y must be positive, limit the graph to quadrant I only.
A. 
B. 
C. 
D. 