We want to find

, where

is a binomial distribution with

and

. So
Answer:

Step-by-step explanation:

Combine like terms:

Multiply both sides by -10:

Answer:
CPCTC
Step-by-step explanation:
You already proved that triangle BAD is congruent to CAD, this means that all of the corresponding angles and sides with be congruent (CPCTC). That means BD is congruent to CD. Hope this helps!
Answer:

Step-by-step explanation:
First find the slope of the line containing points (5,4) and (-7,9). To find the slope use the formula
. Putting those values in, you have

Simplify


Then, to find the slope of the line perpendicular to that, find the negative reciprocal.
