Solve.On a flight from Philadelphia to Detroit, an airplane flying against the wind flew at an average speed of 472 mph. On the return flight, the airplane flew with the wind at an average speed of 490 mph. What was the rate of the airplane in still air?
A. 478 mph
B. 6 mph
C. 481 mph
D. 9 mph
Answer: C
Mathematics
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Determine if each statement is true if
(i) PQRS is a rectangle
(ii) PQRS is a square
In each case, if true, explain why.
(a) PQ = SR
(b) PT =TR
(c) ST = RT
(d) PS = ST
Mathematics
Determine the maximum number of turning points of f.f(x) = (x - 2)2(x + 4)2
A. 2 B. 1 C. 4 D. 3
Mathematics
Graph the system of inequalities. Shade the region that represents the points of intersection.
A. 
B. 
C. 
D. 
Mathematics
Find the limit algebraically.
A. -10 B. -8 C. 8,000 D. -1,000
Mathematics