Stacy made a necklace using 4 times as many blue beads as red beads. She used a total of 40 beads. How many blue beads did Stacy use?

Well, we know that Stacy uses one red bead for every 4 blue beads. So, we can determine that 1 r=4 b. We know that 4+1=5, so 5*8 is 40 (our total). So ti find out how many blue beads she used we would do 4*8=32. So our answer would be 32.