Drag the tiles to the boxes to form correct pairs. Match the pairs of equivalent expressions.
(-14 + 3/2b) – (1 + 8/2b)
4b+13/2
(5+2b)+(2b+3/2)
8b-15
(7/2b-3)–(8+6b)
-5/2b-11
(−10+b)+(7b–5)
– 15 - 5/2b

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?

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)

Geometry - finding area of regular polygons and sectors (check my math, i can’t find the error)