Using a system of equations, it is found that the height of the TV is of 20 inches.
A system of equations is when two or more variables are related, and equations are built to find the values of each variable.
In this problem, the variables are:
The height of the screen of the tv is one half the width plus 5 inches, hence:
h = 0.5w + 5.
Since the width is of 30 inches:
h = 0.5 x 30 + 5 = 15 + 5 = 20.
The height of the TV is of 20 inches.
More can be learned about system of equations at https://brainly.com/question/24342899