Solve the system by substitution. 2u + v = 24u - 3v = -6
A. u = - 
, v = 2
B. u = 0, v = 2
C. u = 2, v = 0
D. u = 2, v = - 
Answer: B
Mathematics
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Use the method of undetermined coefficients to solve the differential equation.y'' - 1y' - 12y = -12ex, y = 6, y' = 14 when x = 0
A. y = e4x + 4e-3x + ex B. y = 4e4x + e-3x + ex C. y = 4e4x + e3x + ex D. y = e-4x + 4e3x + ex
Mathematics
Find the simple interest. The rate is an annual rate unless otherwise noted. Assume 365 days in a year and 30 days per month. Round to the nearest cent.$600 at 5% for 7 years
A. $21.00 B. $210.00 C. $428.57 D. $17.14
Mathematics
Evaluate.log327
A. x = 3
B. x = 1
C. x = 
D. x = 9
Mathematics
Evaluate.If f(x) = 
, find the value of f(-9).
A. -3
B. 3
C. 3
D. 3
Mathematics