Rationalize the denominator and simplify. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 
Answer: D
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Solve the problem.Let x represent the speed of a bicycle in mph. Translate the following sentence into an inequality: "The speed of the bicycle exceeds 12 mph."
A. x ? 12 B. x > 12 C. x ? 12 D. x < 12
Solve the problem.A cylinder is to have a height that is 14 feet less than the radius. Write an expression for the volume of the cylinder in terms of the radius
A. ? r3 - 196? r2 B. ? r3 + 14? r2 C. 2? r2 - 28? r D. ? r3 - 14? r2
Solve the system of linear equations. If the system has infinitely many solutions, describe the solution with an ordered triple in terms of variable z.x + 8y + 8z=87x + 7y + z=18x + 15y + 9z=-9
A. no solution B. (0, 0, 1) C. (-1, 0, 1) D. (1, -1, 1)
Write the expression in the standard form a + bi.i15
A. -1 B. i C. -i D. 1