Solve the system of equations by using the inverse of the coefficient matrix if it exists and by the echelon method if the inverse doesn't exist.-5x + 3y = 8-2x + 4y = 20
A. (2, 6)
B. (-2, -6)
C. (6, 2)
D. (-6, -2)
Answer: A
Mathematics
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Find the Jacobian 
or 
(as appropriate) using the given equations.
A. -9 B. 9 C. 21 D. -21
Mathematics
Find the first two nonzero terms of the Maclaurin expansion of the given function.f(x) = excos x
A. x + x2 - ...
B. 
+ 2x - ...
C. 1 + x2 + ...
D. 1 + x - ...
Mathematics
Find the slope of the line and sketch the graph.y - 2 = 0
A. Slope: 0
B. Slope: Undefined
C. Slope: 
D. Slope: 2
Mathematics
Identify the domain and range of the relation.
A. domain: {3, 8, 13, 18} range: {15, 40, 65, 90} B. domain:{15, 40, 65, 90} range: {3, 8, 13, 18}
Mathematics