D) Later, Jerry purchased items for his garden in his new yard. He purchased plants for $15 and bags of soil for $15. He used the
expression: 15 (x + y)
His friend Valerie says that she would use the expression: 15x + 15y
Are the expressions equivalent? Justify your reasoning using
number properties.

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)