Answer :
Given data:
The first expression is 2+8-z=-24.
The given expression can be written as,
[tex]\begin{gathered} 2+8-z=-24 \\ 10-z=-24 \\ -z=-34 \\ z=34 \end{gathered}[/tex]Thus, the value of z is 34.
Given data:
The given value of m=3.
The second given value is c=6.
The expression for E is,
[tex]E=mc^2[/tex]Substitute the given values in the above expression.
[tex]\begin{gathered} E=(3)(6)^2 \\ =108 \end{gathered}[/tex]Thus, the value of E is 108.