Find the exact value of the following expression without using a calculator.sec (?/2)
A. Undefined
B. 1
C. 0
D. -1
Answer: A
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Provide an appropriate response.What conditions must be placed on the values of x and y so the expression 
will be equal to the expression 
+ 
?
A. y must always be negative. B. x and y must have opposite signs or at least one be zero. C. x and y must have the same signs or at least one be zero. D. y must always be positive.
Multiply and simplify. Assume that all variables represent nonnegative numbers.2
? 2
A. 12x
B. 12x3
C. 12x3
D. 4x3
Solve.The distance D that a spring is stretched by a hanging object varies directly as the weight W of the object. If a 25-kg object stretches a spring 89 cm, find the distance the spring is stretched when the weight is 18-kg. Round to the nearest hundredth of a centimeter if necessary.
A. 64.08 cm B. 132 cm C. 5.06 cm D. 3.56 cm
Fill in the blank with one of the symbols =, <, or > to produce a true statement.-1 ? 19
A. = B. < C. >