Solve the system of equations by the substitution method.
A. (-2, 8)
B. (9, -3)
C. (-3, 9)
D. no solution
Answer: C
Mathematics
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Find the equation of the line that has the given slope and passes through the given point.m = - 
, (5, 2)
A. y = - 
x - 
B. y = 
x - 
C. y = - 
x + 
D. y = - 
x - 
Mathematics
Solve the equation by completing the square.x2 + 4x - 7 = 0
A. {-2 - 1
, -2 + 1
}
B. {-1 - 
, -1 + 
}
C. {-2 - 
, -2 + 
}
D. {2 + 
}
Mathematics
Solve the problem.Use the mathematical model for power gain, G = log 
10, where P0 is the output power in watts and Pi is the input power in watts. Determine the power gain G, in decibels, for an amplifier with an output P0 of 19 watts and an input Pi of 1.1 watts. Round to five decimal places if necessary.
A. 12.37361 dB B. 13.37361 dB C. 12.52853 dB D. 13.20146 dB
Mathematics
Graph the parabola.y2 + 12x = 0 
A. 
B. 
C. 
D. 
Mathematics