Graph the system of inequalities.y ? -x2 - 6x - 4y ? x2 + 6x + 4

A.

B.

C.

D.


Answer: A

Mathematics

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Solve the problem. Round to two decimal places if needed.Find the measure of the central angle (in radians) of a circle of radius r =  foot that intercepts an arc of length s = 4 feet.

A. 15 radians B. 12 radians C. 1.33 radians D. 3 radians

Mathematics

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?

Mathematics

Find a particular solution satisfying the given initial condition.y = 3 + Cx-5; xy'+ 5y = 15; y(1) = -3

A. y = 3 - 6x-5 B. y = 3 + 6x-5 C. y = 3 + 3x-5 D. y = 3 - 3x-5

Mathematics

Find the probability.One digit from the number 5,929,119 is written on each of seven cards. What is the probability of drawing a card that shows 5, 9, or 2?

A.  
B.
C.  
D.  

Mathematics