Answer:
![(-(7)/(6) )](https://img.qammunity.org/2020/formulas/mathematics/middle-school/q8hzgsg6y0s7unqy2p7i7g2qytcstqvkz6.png)
Explanation:
From the question the emerald was located at a depth which is between -1/2 and -1 2/3 meters
This statement can be written as
![(-1(2)/(3)) -(-(1)/(2) )](https://img.qammunity.org/2020/formulas/mathematics/middle-school/edmant1tdnqiqifz9kgs67iwlpagqti6wc.png)
To get the depth, you find the depth of the emerald location, you find difference between the two mentioned depths
![-(1(2)/(3) )-(-(1)/(2) )\\\\](https://img.qammunity.org/2020/formulas/mathematics/middle-school/wvrl5668cvc8o3c8ym97qv6rukb5i2l72x.png)
Change first term to improper fraction
![=-((5)/(3) )-(-(1)/(2) )\\\\](https://img.qammunity.org/2020/formulas/mathematics/middle-school/gfg7xmtf97t80269vhgsnt7ay3f2vdp2r0.png)
Find the LCM to solve the operation the involves the fractions.The Least common multiple here is 6 i.e 3*2
![=(-(5)/(3) )-(-(1)/(2))\\](https://img.qammunity.org/2020/formulas/mathematics/middle-school/ylmdtey193ewiwyp0itgfdwr2mnknt2ygy.png)
![=(-5)/(3) +(1)/(2) =(-10+3)/(6) =(-7)/(6)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/9ljlxsjirtj2wgjqivb70o0njoov4bcl36.png)
The number that could represent the depth at which the emerald was located is
![=(-7)/(6)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/neh1kt11r6eaezs52m3tfbsqj246xpdmgt.png)