Rationalize the denominator of each fraction.
A. 
B. 
C. 
D. 
Answer: A
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Simplify the expression. Write the answer with positive exponents. Assume that all variables represent positive numbers.
2
A. 
B. 
C. 
D. 
Write the number as a binary number.2578
A. 11,110,1012 B. 100,010,1002 C. 101,010,0002 D. 10,101,1112
Solve.An express and local train leave Grays Lake at 3 P.M. and head for Chicago 50 miles away. The express travels twice as fast as the local and arrives 1 hour ahead of the local. Find the speed of each train.
A. Express's rate = 50 mph and local's rate = 25 mph. B. Express's rate = 25 mph and local's rate = 12.5 mph. C. Express's rate = 60 mph and local's rate = 30 mph. D. Cannot be determined with information given.
The letters r and ? represent polar coordinates. Write the equation using rectangular coordinates (x, y).r sin ? = 10
A. y = 10x B. x = 10 C. x = 10y D. y = 10