Lee really wants a cell phone but wonders if it is too expensive. he decides to get
the cheapest plan that costs $27.50 per month. he has 150 minutes free. additional
minutes are 35¢ each. he ends up using the phone way more than he expected. he
ends up using 400 minutes in total. how much extra does lee have to pay?

The extra amount that he paid is $87.5

Step-by-step explanation:

The plan that Lee got costs $27.50 per month. He has 150 minutes free. Additional minutes are 35¢ each. Converting 35¢ to dollars, it becomes 35/100 = $0.35

Let x represent the total number of minutes that Lee used. Let y represent the total cost of using x minutes. Therefore,

y = 27.50 + 0.3535(x - 150)

He ends up using the phone way more than he expected. He

ends up using 400 minutes in total. The total cost of using 400 minutes will be

y = 27.50 + 0.35(400 - 150) = 27.50 + 87.5 = $115

The extra amount that he paid is

0.35(400 - 150) = $87.5

mental cunning

explanation:

he is often referred to as a man of twists and turns