Find the inverse of the matrix (if it exists).
a. 
b. 
c. 
d. Does not exist
d. Does not exist
Mathematics
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Find the median for the given frequency distribution.
A. 68 B. 67 C. 65 D. 66
Mathematics
Solve the problem.Find all points on the curve y = sin x, 0 ? x ? 2?, where the tangent line is parallel to the line 
A. 
, 
B. 
, 
C. 
, 
D. 
, 
Mathematics
Solve the minimization problem by using the simplex method to solve the dual problem.Minimize 12x1 + 8x2subject to x1 + x2 ? 3 3x1 + x2 ? 7and x1 ? 0, x2 ? 0
A. Minimum = 56 when x1 = 0 and x2 = 7 B. Minimum = 24 when x1 = 0 and x2 = 3 C. Minimum = 36 when x1 = 3 and x2 = 0 D. Minimum = 32 when x1 = 2 and x2 = 1
Mathematics
Factor the four-term polynomial by grouping.x3 + 9x2 + x + 9
A. (9x2 + 9)(x + 1) B. (x2 + 1)(x + 9) C. (x2 + 9)(x + 1) D. (x2 + 1)(9x + 9)
Mathematics