Andrew M. answered • 12/12/17

Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors

Nora makes 5/3 quilts per day

Mary makes 3/2 quilts per day

Together they make 5/3 + 3/2 = 19/6 quilts per day

(19/6 quilts/day)(d days) = 20 quilts

d = 20(6/19) = 120/19 = 6.3 days

They will finish on the 7th day