Use a graphing utility to find or approximate solutions to the equation. If necessary, round your answers to three decimal places.3x2 + 5x - 7 = 0
A. -0.281, -1.386
B. 1.386, 0.281
C. 0.907, -2.573
D. 2.573, -0.907
Answer: C
Mathematics
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Refer to the weighted voting system 
and the Shapley-Shubik definition of power. (The three players are P1, P2, and P3.)In how many sequential coalitions is P2 the pivotal player?
A. 6 B. 1 C. 0 D. 2 E. none of these
Mathematics
Solve the equation for solutions in the interval [0°, 360°).sin 2? + sin ? = 0
A. ? = 30°, 90°, 150°, 270° B. ? = 15°, 165°, 195°, 345° C. ? = 105°, 165°, 285°, 345° D. ? = 0°, 120°, 180°, 240°
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Solve.6(y + 5) = 7y + 30
A. 60 B. 0 C. 30 D. -30
Mathematics
Ohm's Law for the current I in a circuit with voltage E, resistance R, capacitance reactance XC, and inductive reactance XLis 
Use this law to solve the problem.Find I if 
R = 9, XL= 7, and XC= 3.
A.
 +  i |
B.
 +  i |
C.
 +  i |
D.
 +  i |
Mathematics