Question

The amount of time (t) in minutes it takes to make a coffee at Starbucks is related to (n) the number of coffees they purchase. The equation is t =2n-3. How long does it take if a customer buys 5 coffees ?

Answer 1

7 minutes

Explanation:

Given the expression for time

`t =2n-3`

say a customer buys 5 coffees, hence n=5

substituting n=5 into the function time it takes to prepare a coffee we have the time it will take to prepare 5 coffees

`t= 2(5)-3\\t=10-3\\t=7`

Hence it will take 7 minutes to prepare 5 coffees