# petra is making necklaces to sell at a craft fair. The hardware for each necklace cost \$3.75, and each bead cost \$0.50. The number of beads Petra needs depends on the the design she chooses. Which expression gives the total cost to make 30 necklaces with b beads?

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## Question:

petra is making necklaces to sell at a craft fair. The hardware for each necklace cost \$3.75, and each bead cost \$0.50. The number of beads Petra needs depends on the the design she chooses. Which expression gives the total cost to make 30 necklaces with b beads?

Let

h———-> number of hardware

T——> total cost for make necklaces

we know that

the total cost for one necklaces is equal to

T=3.75*h+0.50*b———-> h=1

T=3.75+0.50*b

so

the total cost for 30 necklaces is equal to

h=30

T=3.75*30+0.50*b———> T=112.5+0.50*b

therefore