Add the real numbers. Write any improper fraction as a whole or mixed number where appropriate.- 
+ 
A. - 
B. 
C. 1
D. - 1
Answer: D
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Classify the equation as a contradiction, an identity, or a conditional equation. 3x - (4 - x) = 9[7 - (6 + 8x - 7)]
A. Contradiction B. Conditional C. Identity
Solve the problem.On a Touch-Tone phone, each button produces a unique sound. The sound produced is the sum of two tones, given by y = sin (2?lt) and y = sin (2?ht)where l and h are the low and high frequencies (cycles per second) shown on the illustration.
The sound produced is thus given by y = sin (2?lt) + sin (2?ht)Write the sound emitted by touching the 8 key as a product of sines and cosines.
A. y = 2 sin(2188?t) cos(484?t) B. y = 2 sin(625?t) cos(2329?t) C. y = 2 sin(484?t) cos(2188?t) D. y = 2 sin(2329?t) cos(625?t)
Graph the function using transformations.f(x) = 
+ 4
A. 
B. 
C. 
D. 
Change the exponential expression to an equivalent expression involving a logarithm.5-2 = 
A. log1/255 = -2
B. log5
= -2
C. log5-2 = 
D. log-2
= 5