Respuesta :

Answer:

9

Explanation:

Given the expression:

[tex]4a+7[/tex]

When the value of a =1/2

[tex]\begin{gathered} 4a+7=4(\frac{1}{2})+7 \\ =2+7 \\ =9 \end{gathered}[/tex]

The value of the expression when a=1/2 is 9.