Help me plz I need help BRAINLEST

If 3x+8=3x+8 is it one solution or no solution

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²

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)