How do you simplify |−30−5.5i|? |−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|=√302+5.52=√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 1710 views around the world You can reuse this answer Creative Commons License