Write the expression with only positive exponents and evaluate if possible. Assume all variables represent nonzero real numbers.- 
A. 
y + 
x + 
B. 
y + 
x - 
C. 
y - 
x - 
D. 
y - 
x + 
Answer: B
Mathematics
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A. Yes B. No
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Evaluate the expression for the given value or values of the variables.17 - z2; z = -4
A. 1 B. 25 C. 136 D. 33
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Given the grades of a student for one semester, find the grade point average. Assume that the grade point values are 4.0 for an A, 3.0 for a B, and so on. Round to the nearest tenth.
A. 3.6 B. 3.7 C. 9.3 D. 2.4
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