Solve the formula for the given variable.E = hv
for n
A. n = 
B. n = hv
C. n = 
D. n = 
- 
Answer: D
Mathematics
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Perform the indicated operation.(-14a3 + 6a2) - (17a3 - 20a2)
A. -31a3 + 26a2 B. -5a5 C. -31a3 - 14a2 D. 3a3 - 14a2
Mathematics
Solve the equation by completing the square.x2 + 4x = 9
A. 2 + 
B. -1 ± 
C. -2 ± 2
D. -2 ± 
Mathematics
Solve the problem.At the first tri-city meeting, there were 8 people from town A, 7 people from town B, and 5 people from town C. If the council consists of 5 people, find the probability of 2 from town A, 2 from town B, and 1 from town C.
A. 0.038 B. 0.090 C. 0.190 D. 0.076
Mathematics
Use the quadratic formula to solve the equation.0.5x2 + 0.3x + 0.4 = 0
A. {
, 
}
B. {
, 
}
C. {
, 
}
D. {
, 
}
Mathematics