Step-by-step explanation:
Let the number is n. We need to write an expression for "seven less than the quotient of nineteen and a number"
The quotient of nineteen and a number is [tex]\dfrac{19}{n}[/tex] and 7 less than this is [tex]\dfrac{19}{n}-7[/tex]
Now if n = 2, put the value of n in above expression,
[tex]\dfrac{19}{n}-7=\dfrac{19}{2}-7\\\\=\dfrac{5}{2}\\\\=2.5[/tex]
So, the value of the above expression is 2.5 at n = 2.
