Which expression represents, twice the difference of two numbers?

a. 2z - y
b. 2(x - y)
c. 2 - x - y
d. 2(x + y)

you probably already have the answer but anyways it's b. 15.0

step-by-step explanation:

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,

what is the answer?

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c