Graph the solution of the system of inequalities.y ? x - 1y ? -4 - x
A. 
B. 
C. 
D. 
Answer: B
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Write the function in the form y = f(u) and u = g(x). Then find dy/dx as a function of x.y = cot(9x - 6)
A. y = cot u; u = 9x - 6; 
= - 9 cot(9x - 6) csc(9x - 6)
B. y = 9u - 6; u = cot x; 
= - 9 cot x csc2 x
C. y = cot u; u = 9x - 6; 
= - csc2(9x - 6)
D. y = cot u; u = 9x - 6; 
= - 9 csc2(9x - 6)
Find the domain of the given function.f(x) = 
A. (-?, 
]
B. (-?, 
]
C. (-?, ?)
D. [
, ?)
Solve the problem.An earthquake was recorded which was 1,000,000 times more powerful than a reference level zero earthquake. What is the magnitude of this earthquake on the Richter scale? Intensity on the Richter scale is log10(I/I0).
A. 6 B. 13.8 C. 0.6 D. 5
Decide whether the statement is true or false. If it is false, tell why.The equation -x2 = -144 has no real solutions.
A. True B. False; the equation is equivalent to x2 = 144 and has two real solutions, 12 and -12. C. False; the equation has one real number solution, 12.