Provide an appropriate response.Tell whether the statement is true or false. If it is false, give the correct answer. Explain your answer. Assume that x represents a positive real number.
? 
= x
What will be an ideal response?
The statement is true. 
= 
. By the definition of principal square root, 
= |x|, and 
= x when x is a positive real number. (Explanations will vary.)
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Solve the radical equation.
= 9
A. {81}
B. 
C. 
D. {9}
Solve the system using elimination.2x + 18y = -144 8x + 6y = 18
A. (-9, 9) B. (8, -8) C. (-6, 9) D. (9, -9)
Factor the polynomial completely.64x2 - 144xy + 81y2 - 49
A. (8x - 9y - 7)2 B. (8x + 9y + 7)(8x - 9y - 7) C. (8x - 9y + 7)2 D. (8x - 9y + 7)(8x - 9y - 7)
Solve the problem.A simple harmonic motion is described by the equation 
where x is the displacement in meters and t is time in seconds. Find positive values of t for which the displacement is 
.
A. 
+ 8n sec, 
+ 8n sec, n an integer
B. 
+ 8n sec, 
+ 8n sec, n an integer
C. 
+ 8n sec, 
+ 8n sec, n an integer
D. 
+ 8n sec, 
+ 8n sec, n an integer