Question

If f(x) = 5x - 9, find the value of f(-2).
A. 8
B. -19
C. 23
D. -23

Answer 1

\[f(x)=5x-9\]
<=>
\[f(-2)=(5\cdot-2)-9\]
<=>
\[f(-2)=\]

Answer 2

I don't know how to do this lol

Answer 3

replace x with -2 in the formula. erase the x and put in -2
do the arithmetic just as HomeZone shows

Answer 4

you can multiply -2 times 5, right ?

Answer 5

\[x=-2\]
in your linear function \[f(x)=ax+b\]

Answer 6

you insert \[x=-2\]
into your function and find \[f(x)=y\]when \[x=-2\]=>\[f(-2)=(5\cdot-2)-9\]

Answer 7

-10?

Answer 8

to make it easy on you, you just gotta calculate:
\[(5\cdot -2)-9=\]
no it's not -10.

Answer 9

Do you know P.E.M.D.A.S ?

Answer 10

−19

Answer 11

no

Answer 12

Yes, thats correct :)!

Answer 13

I think musa did -2*5 to get -10

then the next step is subtract 9 to get -19

It looks like musa got the correct answer.

Answer 14

ahh i see :P