Simplify the expression. Use positive exponents. Assume variables represent nonzero real numbers.
A. t-5
B. 
C. t2
D. 
Answer: D
Mathematics
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Provide an appropriate response.List several types of equations and inequalities that produce no solution.
What will be an ideal response?
Mathematics
Solve the problem.The temperature of water in a certain lake on a day in October can be determined by using the model 
where x is the number of feet down from the surface of the lake and y is the Celsius temperature of the water at that depth. Based on this model, how deep in the lake is the water 8 degrees? (Round to the nearest foot.)
A. 13 ft B. 69 ft C. 43 ft D. 32 ft
Mathematics
Solve by completing the square to obtain exact solutions.x2 + 3x - 9 = 0
A. -3 ± 3
B. 
C. 
D. 
Mathematics
Evaluate the expression.x2 - 4yz for x = -5, y = 2, and z = 4
A. -7 B. -3 C. -17 D. -13
Mathematics