Solve the system by the addition method.-6x + y = 109x + 4y = -4
A. 
B. {(1, -6)}
C. 
D. 
Answer: D
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Solve the problem.A student must choose 1 of 4 science electives, 1 of 6 social studies electives, and 1 of 9 language electives. How many possible course selections are there?
A. 432 B. 19 C. 216 D. 24
Solve.2.4x + 5.0x = 3.4 + 11.4
A. 2 B. 7.4 C. 8.4 D. -2
Give the focus, directrix, and axis for the parabola.(x + 5)2 = -20(y - 4)
A. (-5, -1), y = 9, x = 4 B. (-5, -1), y = 9, x = 5 C. (-5, -1), y = 9, x = -5 D. (-10,-1), y = 9, x = -5
Solve.The volume V of a given mass of gas varies directly as the temperature T and inversely as the pressure P. A measuring device is calibrated to give 
when 
and 
What is the volume on this device when the temperature is 
and the pressure is 
style="vertical-align: -4.0px;" /> A. V = 13.6 in3 B. V = 166 in3 C. V = 106 in3 D. V = 136 in3