Add or subtract.3i + (-7 - i)
A. 7 - 2i
B. -7 + 2i
C. 7 - 4i
D. -7 + 4i
Answer: B
Mathematics
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Convert.0.72 m = ___ km
A. 0.00072 B. 72 C. 0.0072 D. 720
Mathematics
Convert the angle from degree measure to radian measure. Round to the nearest hundredth of a radian when appropriate.720°
A. 
B. 
C. 8?
D. 4?
Mathematics
Solve the formula for the indicated variable.r = 
for S
A. S = 4?r
B. S = 16?2r2
C. S = 4?r2
D. S = 
Mathematics
Find the real solutions, if any, of the equation. Use the quadratic formula.2x2 + 12x = - 5
A. {
, 
}
B. { 
, 
}
C. {
, 
}
D. {
, 
}
Mathematics