Rationalize the denominator and simplify. Assume that all variables represent positive real numbers.
A. 12
- 1
B. 12
+ 12
C. 
D. 12
- 12
Answer: B
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Solve the problem. Round the answer to the nearest tenth, if necessary.A 22-ft ladder is leaning against a wall. The top of the ladder is 18-ft above the ground. How far is the bottom of the ladder from the wall?
A. 80 ft B. 12.6 ft C. 20 ft D. 6.3 ft
Simplify the expression.
A. -1
B. - 
C. 1
D. 
Use the discriminant to determine the number and type of solutions for the equation. If the solution(s) are real, state whether they are rational or irrational.w2 - 4w + 6 = 0
A. One rational solution B. Two nonreal complex solutions C. Two rational solutions D. Two irrational solutions
Decide on a suitable restriction on the domain so that the function is one-to-one and the range is not changed.f(x) = x2 - 3
A. [3, ?) B. (-?, 2) C. [-3, 3) D. [0, ?)