Show that the function is a solution of the wave equation.w(x, t) = e-7ct cos -7x
A. Yes
B. No
Answer: B
Mathematics
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Use Cramer's rule to solve the system.2.5x + 2.2y = 40.11.0x - 2.3y = -9.4
A. {(9, 8)} B. {(-9, -8)} C. {(-8, 9)} D. {(8, 9)}
Mathematics
Determine whether the two pairs of numbers are proportional.60, 18 and 110, 27
A. Yes B. No
Mathematics
Solve the inequality.
< 0
A. (-7, -5) or (2, 9) B. (-?, -5) or (-7, 9) C. (-7, -5) or (2, ?) D. (-5, 2) or (9, ?)
Mathematics
Find all degree solutions.
?
?
A. 
or 
or 
B. 
or 
or 
C. 
or 
or 
D. 
E. 
or 
or 
Mathematics