Question

What is f(-5) if f(x)=|2x-1| + 10?
a. 21
b. 19
c.-1
d. -21

Answer 1

every time we see an absolute value of an expression, we must commit that it will give us two expressions, but if the value of our variable (x, y, z or anything) is given, then we will just replace that variable with that value and to say absolute is to say that it is positive

| -5 | = 5

|5 - 7| = 2

|-5 + 2| 3

get it?

Answer 2

Yes now what is the next step after you do that?

Answer 3

then do the rest

f(-3) if f(x) = |3x+8| + 3

we replace x with -3 and it will give us
|-3 (-3) + 8| +3
-3 * -3 = 9
so that becomes
|9 + 8| + 3
|17| + 3
17 + 3
20

Answer 4

let me know if you need another example.

Answer 5

im still confused

Answer 6

my answer I got was 0

Answer 7

hello?? @nincompoop