Find all the complex roots. Write the answer in the indicated form.The complex square roots of 4 + 4
i (rectangular form)
A. 
+ 
i, - 
- 
i
B. - 
- 
i, 
- 
i
C. 
- 
i, - 
+ 
i
D. 
+ 
i, - 
- 
i
Answer: D
Mathematics
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Solve the equation.6x + 4(3x - 2) = 15 - 5x
A. 
B. 1
C. 
D. - 1
Mathematics
Find an equation of variation for the given situation.y varies jointly as x and the square of z, and y = 450 when x = 9 and z = 5
A. y = 10xz
B. y = 2xz2
C. y = 3xz2
D. y = 
Mathematics
Solve the equation. First simplify the expression by combining like terms.(y - 5) - (y + 6) = 7y
A. - 
B. - 
C. - 
D. - 
Mathematics
Solve the problem.The annual rainfall in Maine is a random variable with probability density function defined by 
for x in 
Find the mean annual rainfall.
A. 2.994 B. 3.000 C. 3.194 D. 3.360
Mathematics