Provide an appropriate response.Explain in your own words why 
? a when a is negative.
What will be an ideal response?
denotes the principal, or positive, square root of a2. Thus, when a is negative, 
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Divide numerator and denominator by the highest power of x in the denominator to find the limit.
A. 5 B. 125 C. 25 D. does not exist
Solve by addition or substitution.6x - 6y = 244x + 3y = 16
A. (4, 0) B. (4, 1) C. (3, 1) D. ?
Plot the point.(5, -3)
A. 
B. 
C. 
D. 
Provide an appropriate response.The set of grades from different classes is recorded. In the first class, the mean is 80 and the standard deviation is 2. In the second class, the mean is 70 and the standard deviation is 5. In the third class, the mean is 72 and the standard deviation is 4. In which class are the grades most dispersed?
A. First class B. Third class C. Second class