For the pair of functions, find the indicated domain.f(x) = x2 - 81, g(x) = 2x + 3Find the domain of g ? f.
A. (-9, 9)
B. (-?, ?)
C. 
D. 
? 
Answer: B
Mathematics
You might also like to view...
Solve the problem.The sound produced by touching each button on a touch-tone phone is described by y = sin 2?lt + sin 2?htwhere l and h are the low and high frequencies (cycles per second) in the figure shown.
Use a calculator to find the graph of the sound emitted by touching the 5 key in a [0, 0.01, 0.001] by [-2, 2, 1] viewing rectangle.
A. 
B. 
C. 
D. 
Mathematics
Find the equilibrium vector for the transition matrix.
A. 
B. 
C. 
D. 
Mathematics
Evaluate the expression using exponential rules. Write the result in standard notation.
A. -250,000 B. -0.00000025 C. 0.00000025 D. 250,000
Mathematics
Establish the identity.
= cos(2?)
What will be an ideal response?
Mathematics