The function c(x) = 3x − 4 determines how many cupcakes need to be purchased for a birthday party, where x is the number of kids
at the party. The party planner uses d(c(x)) to find the amount of money to bring for the cupcake purchase. The function d(x) = 2x + 5. Solve for how much money to bring when there are 7 kids at the party.
Given: The function determines how many cupcakes need to be purchased for a birthday party, where x is the number of kids at the party. The party planner uses d(c(x)) to find the amount of money to bring for the cupcake purchase. The function
Now,
To find the amount of money to bring when there are 7 kids at the party, put x in d(c(x)), we get
Hence, the amount of money to bring when there are 7 kids at the party = $39