Question

Margaret wants to call her friend overseas. There is a connection fee of 3
and a charge of 1.40
per minute. So the cost of the call is 3+1.4t
dollars for
minutes.

Can she talk for 15
minutes without going over a budget of 25
?

Answer 1

Cost = 3 + 1.4(15) = 3 + 21 = $24.
Yes — $24 ≤ $25, so she can talk 15 minutes and stay within budget (she'd have $1 left).