Decide whether the statement is always true, sometimes true, or never true.The difference between a positive number and a negative number 
A. Sometimes true
B. Never true
C. Always true
Answer: B
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Provide an appropriate response.Perform the indicated operation and write the answer with positive exponent in lowest terms: (a)3/8 ? (a)-1/8
What will be an ideal response?
Solve the problem.The farther someone is from a light source, the less intense its light. The equation I = 
approximates the light intensity from light source Y and I = 
approximates the light intensity from light source Z, where d is measured in meters and I is measured in watts per square meter. Find an expression for the sum of the intensities of light from sources Y and Z.
A. 
B. 
C. 
D. 
Solve using Gauss-Jordan elimination. x + y + z = 1 x - y + 5z = 235x + y + z = -11
A. (5, -1, -3) B. (-3, -1, 5) C. (5, -3, -1) D. No solution
Solve the rational equation.
= 
A. 
B. 
C. 
D. ?