What is #|-25| + |20|#?

1 Answer
sente
Mar 7, 2016

#|-25|+|20| = 45#

Explanation:

The absolute value of a real number #x# may be interpreted as its distance from #0# on the number line. More formally, for all #x inRR#
#|x| = x# if #x >= 0#
#|x| = -x# if #x < 0#

As #-25 < 0# and #20 >= 0# that means #|-25| = 25# and #|20| = 20#
thus

#|-25|+|20| = 25 + 20 = 45#

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