Question

It is about absolute value functions:
If f(x)= x+8, find f(-11)

Answer 1

@grrrxxiii

Answer 2

@CallMeKiki

Answer 3

thanks i did

Answer 4

1

Answer 5

A. -3 B. 3 C. -19 D. 19

Answer 6

that is the answer choices

Answer 7

f(x)= \(\bf |x+8|\), find f(-11) ?

Answer 8

the vertical lines around the x + 8 mean the absolute value

Answer 9

yeah i met to put that sorry

Answer 10

\(\large \bf f(x)= |{\color{brown}{ x}}+8|\qquad f({\color{brown}{ -11}})=|{\color{brown}{ \square ?}}+8|\)

Answer 11

i don't get it

Answer 12

@jdoe001

Answer 13

hmm? have you covered solving functions yet?
that's a plain vanilla function with an argument

Answer 14

lemme put it differrent if it helps then \(\bf f({\color{brown}{ -11}})={\color{brown}{ x}}+8\)
what would that yield?

Answer 15

so it would be -11+8 then

Answer 16

yeap
but bear in mind that, with absolute values
once you remove the "bars"
whatever is inside, it comes out positive
thus \(\large {\bf f(x)= |{\color{brown}{ x}}+8|\qquad f({\color{brown}{ -11}})=|{\color{brown}{ -11}}+8|\to |-3|\quad \to +3 }\)

Answer 17

so it would be B then 3

Answer 18

it'd be 3, or positive 3, since absolute values are always positive

Answer 19

okay thanks

Answer 20

yw