Write an expression using exponents.(-x)(-x)(-x)(-y)(-y)
A. 5(-x)(-y)
B. 3(-x) ? 2(-y)
C. (-x-y)5
D. (-x)3(-y)2
Answer: D
Mathematics
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Solve the problem.Given a group of students: G = {Allen, Brenda, Chad, Dorothy, Eric}, count the number of different ways of choosing a treasurer and a secretary if the two must not be the same sex.
A. 10 B. 6 C. 12 D. 3
Mathematics
Find all the first order partial derivatives for the following function.f(x, y, z) = xz
A. 
= z
; 
= 
; 
= x
B. 
= z
; 
= 
; 
= x
C. 
= z
; 
= - 
; 
= x
D. 
= z
; 
= - 
; 
= x
Mathematics
Solve the formula for the indicated variable.r = 
for S
A. S = 4?r
B. S = 16?2r2
C. S = 4?r2
D. S = 
Mathematics
Solve the system analytically.x - y = 10x - z = 10y + z = 10
A. {(30, 20, -10)} B. {(20, 10, 0)} C. ? D. {(15, 5, 5)}
Mathematics