Use an Euler diagram to determine whether the argument is valid or invalid.Some investments are risky.Real estate is an investment.? Real estate is risky.
A. Valid
B. Invalid
Answer: B
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Graph the functions on the same grid.y = 4x - 1 and y = 
+ 
A. 
B. 
C. 
D. 
Graph the equation.16(x - 2)2 + 9(y + 1)2 = 144
A. 
B. 
C. 
D. 
A screening test for a certain disease is used in a large population of people of whom 1 in 1000 actually have the disease. Suppose that the false positive rate is 1% and the false negative rate is 0.5%. Thus a person who has the disease tests positive for it 99.5% of the time, and a person who does not have the disease tests negative for it 99% of the time.
(a) What is the probability that a randomly chosen person who tests positive for the disease actually has the disease? (b) What is the probability that a randomly chosen person who tests negative for the disease actually has the disease?
Perform the division.
A. x2 + 4x + 16 B. x2 - 4x - 16 C. x2 - 8x + 16 D. x2 - 4x + 16