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.

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

anonymous · Answer

$$U(x)=60x(0.23)$$or
$$U(x)=13.8x$$

anonymous · Answer

That will give you the answer in dollars.

anonymous · Answer

how do u wright a linear equality involving x and y to represent the number of minutes you can use to call the two countries and not exceed the value of your prepaid calling card.

anonymous · Answer

$$60x(0.23) + 60y(0.21) \le75$$
x= number of minutes calling United Kingdom
y=number of minutes calling France