Add to get the exact answer. 
A. 21,500
B. 21,600
C. 20,600
D. 21,580
Answer: B
Mathematics
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Find the inverse of the matrix (if it exists).A =
A. A-1 = 
B. A-1 = 
C. A-1 = 
D. A-1 = 
Mathematics
Convert. When necessary, round the answer to two decimal places.12 miles = _____ yards
A. 
B. 21,120
C. 63,360
D. 12,000
Mathematics
Solve the equation and check your solution.-7x = 42
A. x = 1 B. x = -6 C. x = 49 D. x = -49
Mathematics
Simplify the expression. Assume that all variables are positive.
A. x17/3
B. x13/3
C. 
D. 
Mathematics