Find the inverse of the invertible matrix.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Write sigma notation.9 + 18 + 27 + 36 + 45 + . . .
A. 
B. 
C. 
D. 
Mathematics
Graph the piecewise defined function.
A. 
B. 
C. 
D. 
Mathematics
Evaluate without using a calculator by using ratios in a reference triangle.tan 30°
A. 
B. 
C. 1
D. 
Mathematics
Two points on L1 and two points on L2 are given. Determine whether L1 is parallel to L2, L1 is perpendicular to L2, or neither.L1: (3, 1), (8, -1); L2: (1, -1), (-4, -3)
A. parallel B. perpendicular C. neither
Mathematics