Solve the problem.How many 4-digit numbers can be formed using the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, if repetitions of digits are allowed?
A. 24
B. 256
C. 10,000
D. 9999
Answer: C
Mathematics
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At what points is the given function continuous?f(x, y) = 
A. All (x, y) such that x ? - y B. All (x, y) ? (0, 0) C. All (x, y) D. All (x, y) such that x ? y
Mathematics
Simplify the complex fraction.
A. 0
B. -1
C. - 
D. 9
Mathematics
Which of the following numerals is written in the base indicated by the manner of grouping shown below?
 figure 1.png)
Mathematics
Solve the system by graphing.
A. Infinite number of solutions B. (0, 0) C. (3, 15) D. No solution
Mathematics