Please help A cell phone plan consists of a monthly charge of $39.99 with the first 200 minutes free each month. An additional charge of $.05 per min. occurs for each min. over 200. HOW MANY ADDITIONAL MIN. WERE USED OVER THE FIRST 200?

What is the main idea? What do you know and what do you need to find?

Question

Please help A cell phone plan consists of a monthly charge of $39.99 with the first 200 minutes free each month. An additional charge of $.05 per min. occurs for each min. over 200. HOW MANY ADDITIONAL MIN. WERE USED OVER THE FIRST 200?

What is the main idea? What do you know and what do you need to find?

anonymous · Answer

i suppose you subtract $.05*200 from $39.99 and divide the rest by $.05

across · Answer

This is a word problem. Convert it into math:
$$y=$39.99+$0.05(x - 200 min.)$$Where y is the total monthly charge and x is the amount of minutes used.