Nancy has 40 + 20 = <<40+20=60>>60 pearl beads.
So, Nancy has a total of 40 + 60 = <<40+60=100>>100 beads.
Rose has 2 x 20 = <<2*20=40>>40 stone beads.
So, Rose has 20 + 40 = <<20+40=60>>60 beads.
Thus, Nancy and Rose have 100 + 60 = <<100+60=160>>160 beads altogether.
Therefore, they can make 160/8 = <<160/8=20>>20 bracelets.
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