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Mathematics 10 Online
OpenStudy (anonymous):

Rewrite the expression without absolute value bars. | 21 |

jimthompson5910 (jim_thompson5910):

how far is 21 from zero?

OpenStudy (anonymous):

x = |21| is same x = -21 or x = 21

jimthompson5910 (jim_thompson5910):

ginochen you're thinking of |x| = 21

OpenStudy (anonymous):

ah, sorry, I'm take a mistake @jim_thompson5910 it's right

OpenStudy (anonymous):

21 thats exactly what I thought! thanks for clarifying!

jimthompson5910 (jim_thompson5910):

yep 21 is 21 units away from 0 so |21| = 21

jimthompson5910 (jim_thompson5910):

-21 is 21 units from 0 which is why |-21| = 21

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