Answer: The required simplified form is 3.5r - 7.
Step-by-step explanation: We are given to simplify the following expression :
[tex]E=6.4r-7-2.9r~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)[/tex]
To simplify the given expression, we must combine the like terms, that is, the terms involving r.
From expression (i), we get
[tex]E\\\\=6.4r-7-2.9r\\\\=(6.4-2.9)r-7\\\\=3.5r-7.[/tex]
Thus, the required simplified form is 3.5r - 7.
