<ol>

<li>A telephone company charges x cents for the first

minute of a call and charges for any additional time

at the rate of y cents per minute. If a certain call

costs $5.55 and lasts more than 1 minute, which of

the following expressions represents the length of

that call, in minutes?

(A) 555- x/y

(B)

555+ x- y/y

(C)

555- x+ y/y

(D)

555- x- y/y

(E) 555/x+y</li>

</ol>

<p>Why is the answer C?</p>