Perform the operation. Write the answer as a fraction in lowest terms.
? 
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Find the value of the probability of the standard normal variable Z corresponding to the shaded area under the standard normal curve. Round your answer to four decimal places.
?
?
?
A. ?0.0516 B. ?0.1056 C. ?0.1488 D. ?0.7968 E. ?0.2640
Mathematics
Graph the linear inequality.-2x - 3y ? -6
A. 
B. 
C. 
D. 
Mathematics
Solve the equation and state the solution set.
= 
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.A commuter travels to work, driving a distance d at speed r. At the end of the day, she returns home and drives the same distance 4 mph faster, at a speed r + 4. Her average speed for the round trip can be represented by the expression 
Simplify this expression.
A. 
B. 
C. 
D. 
Mathematics