Solve the equation.log (21) - log x = log (x - 4)
A. -3
B. 7
C. 7, -3
D. 
Answer: B
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Use the method of writing each premise in symbols in order to write a conclusion that yields a valid argument.It is either day or night. If it is daytime, then the squirrels are scurrying. It is not nighttime.
A. The squirrels are not scurrying. B. Squirrels do not scurry at night. C. Squirrels do not scurry during the day. D. The squirrels are scurrying.
Verify the identity.sin(x + y) cos(x - y) = sin x cos x + cos y sin y
What will be an ideal response?
Find the standard-form equation for a hyperbola which satisfies the given conditions.A hyperbola centered at the origin having focus (0, - 2
) and corresponding directrix 
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Find the equation that the given graph represents.
A. P(x) = 2x6 + 9x3 - 7x2 + 4x - 16 B. P(x) = -2x5 + 7x4 + 9x3 - 40x2 + 4x + 16 C. P(x) = -x6 + 7x5 - x2 - 2x + 16 D. P(x) = x5 + 7x4 - x3 - 40x2 + 2x + 16