Calculate. 68 ? 6-9 ÷ 615 ÷ 6-7
A. 6-23
B. 6-9
C. 69
D. 621
Answer: B
Mathematics
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Multiply and simplify.
? 
A. 
B. 
C. - 
D. - 
Mathematics
Solve the equation by applying the rules for rewriting equations.
x + 3 = 
x - 8
A. 7
B. 110
C. 10
D. 
Mathematics
Suppose you have the following project digraph. (The numbers in parentheses represent hours.)
Using the critical-path algorithm to schedule this project with three processors, the project finishing time is
A. 13 hours. B. 12 hours. C. 11 hours. D. 14 hours. E. none of these
Mathematics
For what values of x does the series converge conditionally?
A. x = 0
B. x = 
C. x = - 
D. None
Mathematics