Answer :
Answer:
[tex]2\frac{1}{6}\ hours[/tex]
Step-by-step explanation:
Given
[tex]Session\ 1: 1\frac{1}{6}[/tex]
[tex]Session\ 2: 2\frac{1}{2}[/tex]
[tex]Session\ 3: \frac{2}{3}[/tex]
[tex]Total\ Time = 6\frac{1}{2}[/tex]
Required
Determine the time in the last session
Represent the 4th session with x
So, we have:
[tex]Session\ 1 + Session\ 2 + Session\ 3 + x = Total\ Time[/tex]
Substitute values for Session 1-3 and Total Time
[tex]1\frac{1}{6} + 2\frac{1}{2} + \frac{2}{3} + x = 6\frac{1}{2}[/tex]
Collect Like Terms
[tex]x = 6\frac{1}{2} - 1\frac{1}{6} - 2\frac{1}{2} - \frac{2}{3}[/tex]
Convert to improper fractions
[tex]x = \frac{13}{2} - \frac{7}{6} - \frac{5}{2} - \frac{2}{3}[/tex]
Take LCM
[tex]x = \frac{39 - 7 - 15 - 4}{6}[/tex]
[tex]x = \frac{13}{6}[/tex]
Convert to improper fraction
[tex]x = 2\frac{1}{6}[/tex]
Hence, the time left is [tex]2\frac{1}{6}\ hours[/tex]