Solve the problem.How many 7-letter codes can be formed using the letters A, B, C, D, E, F, G, H, and I. Repeated letters are allowed.
A. 181,440
B. 40,353,607
C. 36
D. 4,782,969
Answer: D
Mathematics
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Multiply. Assume that no radicands were formed by raising negative numbers to even powers.(
+ 1)(
- 1)
A. 2 + 2
B. 2 - 2
C. 4
D. 2
Mathematics
Simplify the rational expression.
A. 
B. 
C. 
D. 15w2x
Mathematics
Determine whether there is a maximum or minimum value for the given function, and find that value.f(x) = x2 - 9x + 2
A. Maximum: 
B. Minimum: 
C. Minimum: - 
D. Minimum: 
Mathematics
Graph the hyperbola.
- 
= 1
A. 
B. 
C. 
D. 
Mathematics