Rachel can make 3 bracelets in an hour. oliver can make only 2 bracelets in an hour, but he already has 5 completed bracelets. explain to rachel how she can use a system of equations to determine when she will have the same number of bracelets as oliver. use complete sentences.

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)