
Michael M. answered 09/23/24
Math, Chem, Physics, Tutoring with Michael ("800" SAT math)
We have two unknowns in this problem.
Let b be the cost of the beads on a single necklace
Let p be the cost of the pendant on a single necklace.
Then the total cost comes out to be the cost of the beads on the six necklaces plus the cost of the pendants on the six necklaces.
Because we have 6 groups of beads and 6 pendants, we get the equation:
6b + 6p = $38.40
We're given b = $2.70
By substituting
6($2.70) + 6p = $38.40.
Lastly solve for p