f(t)=5t - 7\nf( )=48

Explanation:

Step1: Substitute into the function

Let the value in the box be (x). Then (f(x)=5x - 7), and since (f(x)=48), we have the equation (5x-7 = 48).

Step2: Solve for (x)

Add (7) to both sides of the equation: (5x-7 + 7=48 + 7), which simplifies to (5x=55). Divide both sides by (5): (x=\frac{55}{5}).

Answer:

(11)