Solve by using the quadratic formula.7x2 + 12x = - 1
A. 
B. 
C. 
D. 
Answer: C
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Graph the linear function. Give the domain and range.f(x) = 
x
A. Domain: (-?, ?)
Range: (-?, ?)
B. Domain: (-?, ?)
Range: (-?, ?)
Perform the indicated operation.(2x5y3)(-7x4y)
A. -14x9y3 B. -14x9y C. -14x9y4 D. -14x20y3
Solve the problem.A rectangular piece of cardboard measuring 18 inches by 49 inches is to be made into a box with an open top by cutting equal size squares from each corner and folding up the sides. Let x represent the length of a side of each such square. For what value of x will the volume be a maximum? If necessary, round to 2 decimal places.
A. 21.18 in. B. 18.32 in. C. 36.64 in. D. 4.01 in.
Write a general formula to describe the variation.The surface area S of a right circular cone varies directly as the radius r times the square root of the sum of the squares of the base radius r and the height h. The constant of proportionality is ?.
A. S = ?r
B. S = ?r
C. S = ?r
D. S = ?