Question

How do you graph the number 7 - 5i in the complex plane and find its absolute value?

Answer 1

I found a value of `8.6`

Explanation:

On the complex plane you use the horizontal axis to plot the number of the real part (`7`) and the vertical one for the imaginary (`-5`):

The absolute value, I think, would be the modulus of your number, i.e., the distance `rho` from the origin to the point representative of your number that we can find using Pythagoras:
`rho=sqrt(7^2+(-5)^2)=sqrt(49+25)=8.6`