The expression fits this description is [tex]= \rm \dfrac{5(x+y)}{-8x}[/tex].
We have to determine which expression fits this description.
According to the question,
To determine the expression which fits the given instruction following all the steps given below.
1. The expression is the quotient of two quantities.
2. The numerator of the expression is the product of the sum of x and y.
[tex]= \rm 5(x+y)[/tex]
3. The denominator is the product of the -8 and x.
[tex]\rm = -8 \times x\\\\= -8x[/tex]
Therefore,
The required expression is,
[tex]= \rm \dfrac{5(x+y)}{-8x}[/tex]
Hence, the expression fits this description is [tex]= \rm \dfrac{5(x+y)}{-8x}[/tex].
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