Answer:
NK=12
Step-by-step explanation:
x^2 +9^2=15^2
x^2+81=225
subtract 81
x^2=144
x=12
(This is only for number 13, I don't know the answer to 14-16)
4 (x + yi) +5 (x + yi)
(4x + 4yi) + (5x + 5yi)
4x _5x +4yi _5yi
_1x + _1yi
therefore x= _1
The formula of a slope:

We have the points A(2, 18) and B(-2, 4). Substitute:

Answer:
10
Step-by-step explanation:
My guy just plug in the number for x it's not that hard