Answer:
0.5x + 7.5 / (x + 6)
Step-by-step explanation:
Let x be the number of wooden beads
wooden bead = $0.50 each
glass bead = $1.25 each
since average cost of bead = (cost of wooden bead + cost of glass bead)/ total number of beads
equation is (0.5x + (6*1.25))/(x + 6)
The model equation is therefore 0.5x + 7.5 / (x + 6)