High School

What is the value of the expression below when [tex]$f=2.5$[/tex]?

[tex]$8 + 4f$[/tex]

A. 132
B. 18
C. 42
D. 28

Answer :

We are given the expression

[tex]$$
8 + 4f
$$[/tex]

and the value of [tex]$f$[/tex] is [tex]$2.5$[/tex]. Follow these steps:

1. Substitute [tex]$f = 2.5$[/tex] into the expression:

[tex]$$
8 + 4(2.5)
$$[/tex]

2. Multiply [tex]$4$[/tex] by [tex]$2.5$[/tex]:

[tex]$$
4 \times 2.5 = 10
$$[/tex]

3. Add this result to [tex]$8$[/tex]:

[tex]$$
8 + 10 = 18
$$[/tex]

Thus, the value of the expression when [tex]$f=2.5$[/tex] is [tex]$18$[/tex].

So, the correct answer is [tex]$\boxed{18}$[/tex].