Use distributive property
-9(-m+4)

-9m+-36

Step-by-step explanation:

9m-36

Step-by-step explanation:

-9times -m = 9m

-9 times 4 = -36

9m-36

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,