You have relatives living in the United Kingdom and in France. Suppose that you have purchased a prepaid phone card with a value of $75. Calls to the United Kingdom cost 23¢ per minute, while calls to France cost 21¢ per minute.

Part I: Write an expression for the total cost of calling to the United Kingdom, U(x), for a total of x minutes.

Question

You have relatives living in the United Kingdom and in France. Suppose that you have purchased a prepaid phone card with a value of $75. Calls to the United Kingdom cost 23¢ per minute, while calls to France cost 21¢ per minute.

Part I: Write an expression for the total cost of calling to the United Kingdom, U(x), for a total of x minutes.

samsan9 · Answer

how should i start in writing this?

anonymous · Answer

ok I meant:
75 = total cost
x = minutes that you called to france.

 france + england= 75
england = 75 - france
U(x) = 75 - (0.21)x

anonymous · Answer

almost mixed up finding france cost haha