Determine the discriminant of the quadratic equation. Use the value of the discriminant to determine whether the quadratic equation has two rational solutions, two irrational solutions, one repeated real solution, or two complex solutions that are not real.3x2 = 4x - 6
A. One repeated real solution
B. Two irrational solutions
C. Two rational solutions
D. Two complex solutions that are not real
Answer: D
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Solve the problem.Find the equation for the tangent plane to the surface 
at the point 
A. z = 2 B. z = 0 C. z = 1 D. z = -1
Use the leading coefficient test to determine whether y?? or y?-? as
y = 6x3 + 9x2 - 5x + 4
A. -? B. ?
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.The wind is blowing at 10 knots. Sailboat racers look for a sailing angle to the 10-knot wind that produces maximum sailing speed. In this application, (r, ?) describes the sailing speed r, in knots, at angle ? to the 10-knot wind. Four points in this 10-knot-wind situation are (6.9, 65°), (7.5, 85°), 
and 
. Based on theses points, which sailing angle to the 10-knot wind would you recommend to a serious sailboat racer? What sailing speed is achieved at this angle?
A. 110°; 7.6 knots B. 85°; 7.5 knots C. 130°; 7.4 knots D. 65°; 6.9 knots