Answer: The required value of the given expression is 8.
Step-by-step explanation: We are given to evaluate the following expression for t = 6 and [tex]u=\dfrac{1}{4}:[/tex]
[tex]E=6t-20-32u~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)[/tex]
To evaluate the given expression, we must substitute the values of t and u in (i).
From (i), we get
[tex]E\\\\=6t-20-32u\\\\=6\times 6-20-32\times\dfrac{1}{4}\\\\=36-20-8\\\\=36-28\\\\=8.[/tex]
Thus, the required value of the given expression is 8.
