Solve the logarithmic equation. Give an exact answer.log(5 + x) - log(x - 4) = log 4
A. ?
B. {7}
C. {-7}
D. 
Answer: B
Mathematics
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Solve the problem.The annual precipitation for one city is normally distributed with a mean of 294 inches and a standard deviation of 3.9 inches. Find D5.
A. 301.8 in. B. 286.2 in. C. 305.7 in. D. 294 in.
Mathematics
Solve.12x - 36 - x2 < 0
A. (6, ?) B. (-?, 6) ? (6, ?) C. (?, 6) D. (-6, 6)
Mathematics
Factor out a factor with a negative coefficient.-7x - 21
A. 7(x - 3) B. 7(x - 21) C. -7x(4) D. -7(x + 3)
Mathematics
Sketch the straight line defined by the linear equation by finding the x- and y- intercepts.
-2x-4y+8=0
Mathematics