Solve the system of equations using the addition method.
x + 
y = -1 x - y = -12
A. (7, 6)
B. (-7, 5)
C. (-8, 6)
D. no solution
Answer: B
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Solve for the specified variable.
+ 
= c for b
A. b = 
B. b = 
C. b = 
- a
D. b = ac - 
Use Bayes' rule to find the indicated probability.The incidence of a certain disease on the island of Tukow is 4%. A new test has been developed to diagnose the disease. Using this test, 91% of those who have the disease test positive while 4% of those who do not have the disease test positive (false positive). If a person tests positive, what is the probability that he or she actually has the disease?
A. 0.438 B. 0.487 C. 0.91 D. 0.856
The triangles are similar. Find the angle or side in the other triangle that corresponds to the given angle or side.
A. 
B. Cannot be determined
C. 
D. 
Simplify.
A. 44 B. -20 C. 22 D. -44