For a long-distance person-to-person telephone call, a telephone company charges $ 0.21 for the first minute, $ 0.17 for each additional minute, and a $ 1.59 service charge. If the cost of a call is $ 2.31 comma how long did the person talk?
Accepted Solution
A:
Answer:4 minutesStep-by-step explanation:0.21+1.59=1.82.31=0.17x+1.8Subtract 1.8 from both sides0.51=0.17xDivide both sides by 0.173=x3 minutes plus the original minute spent talkingThey spent 4 minutes total talking on the phone