Question

Which of the following is equivalent to |5x – 1| = 20?

Answer 1

What are your choices?

Answer 2

5x – 1 = 20
5x – 1 = 20 or 5x – 1 = -20
5x – 1 = -20
none of the above

Answer 3

Okay, absolute value, or the | | marks, mean that there will be no negatives. This equation is saying that 5x - 1 = 20.

Answer 4

if

|x| = k

then

x = k or x = -k

for any positive number k

Answer 5

if you ever see anything that is like \[\left| x \right|\] it is always going to be a positive number