Problema Solution
a student needs to make a long distance phone call. the charges are .75 for first three minutes and 14 cents for each additional minute. how many minutes can the call last for 2.15
Answer provided by our tutors
let x = the number of minutes the student will talk
0.75 + (x - 3)0.14 = 2.15
by solving we find
x = 13 min
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the student will talk 13 minutes.