Question

Let f(x) = 9x - 4.5. Find the value of f(2).
a 6.5
b 87.5
c 13.5
d 9
Okay so I know that you're supposed to insert 2 for x and solve I just don't know how to solve it from there. Please help?

Answer 1

put 2 for x
\(9*2-4.5\\9*2=?\)

Answer 2

You need to replace \(x\) for 2.

\(f(x) = 9(2) - 4.5\)

Answer 3

Sorry wait.
\(f(2) = 9(2) - 4.5\)

Answer 4

So 9*2=18-4.5?

Answer 5

yup

Answer 6

now you just need to evaluate \(18 - 4.5\)

Answer 7

13.5.
So 13.5 is the answer?

Answer 8

yes

Answer 9

correct!

Answer 10

Thanks you guys!

Answer 11

yw :)