Write a matrix equation equivalent to the system of equations. 9x - 7y = 9-4x - 5y = 4
A. 
= 
B. 
=
C.
  = |
D.
=
Answer: C
Mathematics
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Solve the problem.A survey of 128 college students was done to find out what elective courses they were taking. Let A = the set of those taking art, B = the set of those taking basketweaving, and C = the set of those taking canoeing. The study revealed the following information.n(A) = 45n(A ? B) = 12n(B) = 55n(A ? C) = 15n(C) = 40n(B ? C) = 23n(A ? B ? C) = 2How many students were not taking any of these electives?
A. 36 B. 46 C. 38 D. 10
Mathematics
Find the integral.
A. 
+ C
B. 
+ C
C. 
+ C
D. 
+ C
Mathematics
Find the derivative of y with respect to the independent variable.y = (cos ?)
A. -
cos ? sin ?
B. 
(cos ?)
-1
C. -
(cos ?)
-1 sin ?
D. -(cos ?)
-1 sin ?
Mathematics
Solve the equation.|x| - 12 = -13
A. {1, -1} B. {-1} C. {1} D. no solution
Mathematics