Solve the problem.How many 6-symbol codes can be formed using 4 different symbols? Repeated symbols are allowed.
A. 360
B. 15
C. 30
D. 4096
Answer: D
Mathematics
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Simplify by writing the expression with positive exponents. Assume that all variables represent nonzero real numbers.
-4
A. 
B. 
C. 
D. 
Mathematics
Solve the equation by completing the square.-x2 + 2x = -1
A. {1 ± 
}
B. 
C. {-1 ± 
}
D. {1, 2}
Mathematics
Multiply and reduce to lowest terms.
? 
A. 
B. 
C. 
D. 
Mathematics
Convert. When necessary, round the answer to two decimal places.36 pints = quarts
A. 144 B. 18 C. 9 D. 72
Mathematics