Simplify. Be sure to rationalize the denominator. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Solve the problem.A plane flies 420 miles with the wind and 350 miles against the wind in the same length of time. If the speed of the wind is 22 mph, what is the speed of the plane in still air?
A. 232 mph B. 242 mph C. 247 mph D. 267 mph
Mathematics
Solve the problem.Find the linearization of the function f(x) = 
for a = 0.
A. y = x + 2
B. y = 
x + 
C. y = 
x
D. y = 
x + 
Mathematics
The line graph shows the recorded hourly temperatures in degrees Fahrenheit at an airport. Use the graph to answer the question.
At what time was the temperature the lowest?
A. 10 a.m. B. 1 p.m. C. 6 p.m. D. 9 a.m.
Mathematics
Simplify.|3|
A. 3 B. 0 C. 6 D. -3
Mathematics