Should be C.
This is the first time I know FOIL represents : First, outer, inner and last. It represents the method to solve the product of binomials.
Answer:
∴ 2nd equation can be used to determine the length of other leg.
Which is known as 
Step-by-step explanation:
Given,
A Right Triangle has hypotenuse of
units and one leg has
units.
We know Pythagoras Formula for Right Triangle;

Here hypotenuse and one leg values in above equation and take
;



So 2nd equation can be used to determine the length of other leg.
It's really easy just divide 800/50
the answer is 16 times
M=y2-y1/x2-x1
M=1-2/3-2
M=-1/1
M=-1
Hope this helps!
Answer:
4
Step-by-step explanation:
Cuzzzzz I know this stuff realy well