Solve the equation.
+ 
= -1
A. {5}
B. ?
C. {0}
D. 
Answer: B
Mathematics
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Solve the problem.One digit from the number 3,565,885 is written on each of seven cards. What is the probability of drawing a card that shows 3, 5, or 6?
A. 
B. 
C. 
D. 
Mathematics
Identify the equation as either an identity or not.sec4 ? - tan4 ? - 2 sec2 ? = -1
A. Not an identity B. Identity
Mathematics
Solve the problem. Round your answer to the nearest tenth, if necessary.Working together, Rick and Juanita can complete a job in 6 hr. It would take Rick 9 hr longer than Juanita to do the job alone. How long would it take Juanita alone?
A. 3 hr B. 6 hr C. 9 hr D. 15 hr
Mathematics
Expand, where i2 = -1.(1 + i)8
A. -64
B. 16
C. 
D. 
Mathematics