Answer the question.Is 
= 
? Explain your answer.
What will be an ideal response?
No, because the shortcut of "moving terms with negative exponents up or down" only works in fractions with monomial numerators and denominators.
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The concentration (in milligrams/cubic centimeter) of a certain drug in a patient's body t hr after injection is given by
?
.
?
When is the concentration of the drug increasing, and when is it decreasing?
?
A. Increasing on 
, decreasing on 
B. Increasing on 
, decreasing on 
C. Increasing on 
, decreasing on 
D. Increasing on 
, decreasing on 
E. Increasing on 
, decreasing on 
Perform the indicated operation and express in lowest terms.
- 
A. 
B. 
C. 
D. 
Graph the system of inequalities.2x + 3y ? 6 x - y ? 3 y ? 2
A. 
B. 
C. 
D. 
Solve the formula for the indicated letter. Assume that all variables represent nonnegative numbers.c2 + d2 + f2 = g2 for c
A. c = ±
B. c = g - d - f
C. c = ±
D. c = g2 - d2 - f2