ANSWER
1
EXPLANATION
We want to evaluate the expression given that x = 2/5 and z = -0.2:
[tex]2x-z[/tex]To do this, subsitute the values of x and z into the expression:
[tex]\begin{gathered} 2(\frac{2}{5})-(-0.2) \\ \frac{4}{5}+0.2 \end{gathered}[/tex]Convert the decimal to a fraction:
[tex]\frac{4}{5}+\frac{1}{5}[/tex]Now, simplify:
[tex]\begin{gathered} \frac{4}{5}+\frac{1}{5} \\ =\frac{5}{5} \\ =1 \end{gathered}[/tex]That is the answer.
