Does each pair of expressions form an equation when joined with an equals sign? Select Yes or No for each pair of expressions. Expressions Yes No (15)2+1 and 2⋅1225 Yes – 1 5 2 +1 and 2⋅ 12 25 No – 1 5 2 +1 and 2⋅ 12 25 (1+14)2 and 2−716 Yes – 1+ 1 4 2 and 2− 7 16 No – 1+ 1 4 2 and 2− 7 16

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)