Write an equation that expresses the relationship. Use k for the constant of proportionality.w varies directly as x and inversely as the square of y.
A. wxy2 = k
B. w = 
C. w = 
D. w + x - y2 = k
Answer: C
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Find the center and radius of the circle with equation 
.
?
A. Center: (7, 2)Radius: 5 B. Center: (-7, 2)Radius: 25 C. Center: (7, -2)Radius: 25 D. Center: (7, -2)Radius: 5 E. Center: (-7, 2)Radius: 5
Evaluate the expression.-
A. 13 B. -13 C. -84 D. Not a real number
Solve the equation. Express radicals in simplest form.y2 = 21
A. 
B. ±
C. 441
D. 10.5
A bus company operates four bus routes (A, B, C, and D) and 50 buses. The buses are apportioned among the routes on the basis of average number of daily passengers per route which is given in the following table.
Find the apportionment of the buses among the routes using Hamilton's method.
A. Route A: 7; Route B: 18; Route C: 9; Route D: 16 B. Route A: 6; Route B: 18; Route C: 9; Route D: 17 C. Route A: 7; Route B: 18; Route C: 10; Route D: 16 D. Route A: 7; Route B: 17; Route C: 9; Route D: 17 E. none of these