Determine whether the function is a solution of the wave equation.w(x, t) = cos (-3ct) sin (-3x)
A. Yes
B. No
Answer: A
Mathematics
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Use the Euclidean algorithm to find the GCF of the numbers. ? 102, 78 and 138 ?
A. 7 B. 6 C. 5 D. 8 E. none of these
Mathematics
Solve the equation.
+ 
= - 
A. 
B. 
C. 
D. 
Mathematics
Find all the second order partial derivatives of the given function.f(x, y) = x2 + y - ex+y
A. 
= 2 + ex+y; 
= ex+y; 
= 
= ex+y
B. 
= 2 - y2ex+y; 
= -x2ex+y; 
= 
= - y2ex+y
C. 
= 1 - ex+y; 
= - ex+y; 
= 
= -ex+y
D. 
= 2 - ex+y; 
= - ex+y; 
= 
= -ex+y
Mathematics
Solve: 8 + 4(x - 3) = 6x - 7
A. 
B. 
C. 
D. 
Mathematics