How do you simplify #abs(-30 - 5.5i )#? #abs(-30 - 5.5i )#= sqrt(30^2+5.5^2)=sqrt(900+30.25)=30.5 Precalculus Complex Numbers in Trigonometric Form Complex Number Plane 1 Answer José F. Feb 7, 2016 30.5 Explanation: #|−30−5.5i|= sqrt(30^2+5.5^2)=sqrt(900+30.25)=30.5# Answer link Related questions What is the complex number plane? Which vectors define the complex number plane? What is the modulus of a complex number? How do I graph the complex number #3+4i# in the complex plane? How do I graph the complex number #2-3i# in the complex plane? How do I graph the complex number #-4+2i# in the complex plane? How do I graph the number 3 in the complex number plane? How do I graph the number #4i# in the complex number plane? How do I use graphing in the complex plane to add #2+4i# and #5+3i#? How do I use graphing in the complex plane to subtract #3+4i# from #-2+2i#? See all questions in Complex Number Plane Impact of this question 1504 views around the world You can reuse this answer Creative Commons License