Solve by the substitution method. If the system is inconsistent or dependent, say so.9x + 40 = -7y5x - 4y = 33
A. No solution
B. (1, -7)
C. (0, -6)
D. (1, -6)
Answer: B
Mathematics
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Determine whether the given function is one-to-one. If it is one-to-one, find its inverse.f(x) = 
A. f-1(x) = 
B. f-1(x) = 
C. f-1(x) = 
D. Not one-to-one
Mathematics
Solve for x.32x + 1 = 27
A. x = -1 B. x = 3 C. x = 9 D. x = 1
Mathematics
An initial investment of $4000 grows at an annual interest rate of 5% compounded continuously. How long will it take to double the investment?
A. 1 year B. 14.40 years C. 13.86 years D. 14.86 years E. 13.40 years
Mathematics
Find all solutions of the given system and choose the graph of the system that shows the solutions.
?
?
A. ?
B. ?
C. ?
D. ?
E. ?
Mathematics