Please answer this question quickly!

Addition Property of Equality

Step-by-step explanation:

That property says it's OK to add the same number to both sides of an equation

If  a = b,  then  a + c = b + c

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,