Consider these figures:
Which figure above, if any, is topologically equivalent to the given figure? Identify the topologically equivalent figure by letter.A stop sign
A. A
B. B
C. C
D. None of these
Answer: A
Mathematics
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Use the inverse of the coefficient matrix to solve the system of equations. y + z = 8,3x -z = 5, 2x + y + 3z = 9; A-1 = - 
A. 
B. 
C. 
D. 
Mathematics
Identify the number as prime, composite, or neither.1
A. Prime B. Composite C. Neither
Mathematics
Find the least common multiple.6, 7
A. 13 B. 6 C. 21 D. 42
Mathematics
Use the formula for the nth term to find r.a = -3, r > 0, a5 = -243
A. 
B. 81
C. 3
D. 9
Mathematics