Solve the system of equations.x - y + z = 8x + y + z = 6x + y - z = -12
A. (-2, -1, -9)
B. (-2, -1, 9)
C. (2, -1, 9)
D. (2, -1, -9)
Answer: B
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Find 
and 
.f(x, y) = ln 
A. 
= - 
; 
= 
B. 
= -ln
; 
= ln 
C. 
= 
; 
= 
D. 
= -ln 
; 
= ln 
Perform the operation. Write the answer as a fraction in lowest terms.6
- 2
A. 
B. 25
C. 
D. 
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
Find the measures of two angles, one positive and one negative, that are coterminal with the given angle.202°
A. 562°; -248° B. 562°; -158° C. 382°; -158° D. 472°; -68°