Kim is x years old. jordan is 9 years older than kim. five times jordan’s age is equal to 110.
(a) write an equation that could be used to solve for kim’s age, x.
(b) how old is kim?
(c) how old is jordan?

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)