Maximize f(x, y, z) = x + y + z subject to the constraint 
Enter your answer as just 3a where a is a reduced fraction of form 
.
What will be an ideal response?
31/2
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Determine whether the statement is true or false.If c and d are complex numbers, then 
= 
- 
A. True B. False
Solve the system of equations using Cramer's Rule if it is applicable. If Cramer's Rule is not applicable, say so.
A. x = 6, y = 1, z = 6; (6, 1, 6) B. x = 4, y = -6, z = -1; (4, -6, -1) C. x = 4, y = 6, z = 1; (4, 6, 1) D. x = 5, y = 4, z = 1; (5, 4, 1)
Solve the problem.The change in a certain engineer's salary over time can be approximated by the linear equation 
where y represents salary in dollars and x represents number of years on the job. According to this equation, after how many years on the job was the engineer's salary $61,000?
A. 8 years B. 10 years C. 11 years D. 9 years
Perform the indicated operation. Assume that all variables are nonnegative.-2
- 7
A. -6
B. 6
C. -22
D. 22