Answer:
75
Step-by-step explanation:


Answer:
Perpendicular
Step-by-step explanation:
m=y2-y1/x2-x1
m=15-3/14-(-2)
m=3/4
Answer: 12
Step-by-step explanation:
this is a right angled triangle so you use the pythagorean theory
which is a^2 + b^2 = c^2
you have c and b already. c is the hypotenuse.
a^2 + 16^2 = 20^2
a^2 + 256 = 400
a^2 = 400 - 256
a^2 = 144
then you square root 144 and get..
a = 12
I believe it is the first one but I might be wrong.