Determine what signs on values of x and y would make the statement true. Assume that x and y are not 0.xy < 0
A. x and y have the same sign.
B. x and y must be negative.
C. x and y must be positive.
D. x and y have different signs.
Answer: D
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Solve the equation. Express radicals in simplest form.b2 + 
b = - 
A. 
B. 
C. ?
D. 
Write the sum 214+192 in expanded form.
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The eigenvalues of the matrix 
are
Select the correct answer.
?
A. 
, 
, 
B. 
, 
, 
C. 
, 
, 
D. 
, 
, 
E. 
,,
Provide an appropriate response.One way to measure a person's cardiofitness is to calculate how many METs, or metabolic units, he or she can reach at peak exertion. One MET is the amount of energy used when sitting quietly. To calculate ideal METs, we can use the expression: 
Researchers recommend that a person reach approximately 85% of his or her MET when exercising. Calculate 85% of the ideal MET for a 55-yr-old woman. Then refer to the following table. What activity can the woman do that is approximately this value? 
A. 7.353; Skiing B. 8.65; Cycling C. 8.65; Skiing D. 7.353; Swimming