Write the expression with only positive exponents and evaluate if possible. Assume all variables represent nonzero real numbers.
A. 
B. 
C. 
D. 
Answer: C
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Solve the system of equations by Gaussian elimination. If there is an unlimited number of solutions, find two of them.-6x + 4y = 24 3x - 2y = -12
A. x = -4, y = 1 B. Inconsistent C. x = -5, y = 1 D. x = -4, y = 0
Gastric juice has a hydrogen ion concentration of 0.13 mol/L. What is the pH of gastric juice?
A. 0.89 B. 0.13 C. 1.35 D. 4.69 × 10-14
Solve the problem.A cylinder is to have a height that is 14 feet less than the radius. Write an expression for the volume of the cylinder in terms of the radius
A. ? r3 - 196? r2 B. ? r3 + 14? r2 C. 2? r2 - 28? r D. ? r3 - 14? r2
The Mexican subsidiary of ThermoMaster manufactures an indoor-outdoor thermometer. Management estimates that the profit (in dollars) realizable by the company for the manufacture and sale of x units of thermometers each week is 
.
?
Find the intervals where the profit function P is increasing and the intervals where P is 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 