Question

Could someone help me solve these problems:

1. |-3i|
2. (-1 + 2i) + (6-9i)
3. 3+2i/4+ i

PLEASE HELP!!!

Answer 1

1. 3i

Answer 2

What about 2 and 3?

Answer 3

hint: |a+bi| = sqrt(a^2 + b^2)

Answer 4

Yaa could you break it down i am new to this!

Answer 5

-3i = 0-3i = 0 + (-3i)

Answer 6

so -3i is in the form a+bi where a = 0 and b = -3

Answer 7

plug in a = 0 and b = -3

into |a+bi| = sqrt(a^2 + b^2)

Answer 8

ok thanks i think i understand it know!

Answer 9

you're welcome