Question

Question #1a65f

Answer 1

`9" years"`

Explanation:

`"we wish to calculate n the number of years"`

`V=(12000/(n+1))+100`

`"here "V=1300`

`rArr1300=(12000)/(n+1)+100`

`"subtract 100 from both sides"`

`1300-100=(12000/(n+1))cancel(+100)cancel(-100)`

`rArr1200=12000/(n+1)`

`rArr1200(n+1)=12000larrcolor(blue)" cross-multiplying"`

`rArr1200n+1200=12000`

`"subtract 1200 from both sides"`

`rArr1200n=10800`

`"divide both sides by 1200"`

`rArrn=10800/1200=9" years"`