Find A-1 if it exists.A = 
A. 
B. 
C. 
D. Does not exist
Answer: D
Mathematics
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Provide an appropriate response.Subtract the fractions and reduce: 
- 
A. -
B. -2
C. -
D. 
Mathematics
Find the angle between u and v in radians.u = 5i, v = 5i - 10j
A. 1.56 B. 1.40 C. 1.11 D. 0.46
Mathematics
Perform the indicated operation and simplify.
÷ 
A. 
B. 
C. 
D. 
Mathematics
You are on a shopping trip. The store will round the amount you pay for each item to the nearest cent. Find the amount you will pay.Paper towels are 5 rolls for $19.58, so one roll is $3.9160. You pay:
A. $4.02 B. $3.916 C. $3.91 D. $3.92
Mathematics