in an inverse equation, y = 2 when x = 4. write an inverse variation equation that shows the relationship between x and y.

What function has a range {yly< 5}? question on picture above^

What is the area of the shaded sector?

Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)