Determine if the equation specifies a function with independent variable x. If so, find the domain. If not, find a value of x to which there corresponds more than one value of y.x - y2 = 9
A. A function with domain ?
B. Not a function; for example, when x = 10, y = ±1
Answer: B
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Solve the problem.Suppose you would like to cross a 219-foot wide river in a boat. Assume that the boat can travel 38 mph relative to the water and that the current is flowing west at the rate of 7 mph. What bearing should be chosen so that the boat will land at a point exactly across from its starting point? Give your answer to the nearest tenth of a degree.
A. 10.6° B. 7.1° C. 79.4° D. 8.5°
Solve the inequality analytically, writing the solution set in interval notation.-8a - 7 > -9a - 2
A. (5, ?) B. (-?, 5) C. (-9, ?) D. (-?, -9)
Solve the equation.(y - 3) - (y + 4) = 6y
A. y = - 
B. y = - 7
C. y = - 
D. y = - 
Find the domain and the vertical asymptote of the function.f(x) = ln (4 - x)
A. Domain: (-?, -4); vertical asymptote: x = -4 B. Domain: (-?, 4); vertical asymptote: x = 4 C. Domain: (-4, ?); vertical asymptote: x = -4 D. Domain: (4, ?); vertical asymptote: x = 4