If ad = y + 6 and dc = 2y, what is the length of dc?

Step-by-step explanation:

Step 1

Find the value of y

In this problem we know that

-----> equation A

see the attached figure to better understand the problem

so

we have

substitute the values in the equation A

solve for y

Step 2

Find the value of DC

we have that

substitute the value of y

for any of you who need the translation here it is

step-by-step explanation:

find the angular size of the equatorial radius of the earth, if the horizontal parallax of the sun

y = - 6

step-by-step explanation:

given the point (- 2, y) lies on the graph then it is a solution of it's equation.

substitute x = - 2 into the equation for value of y

y = 3(- 2) = 3 × - 2 = - 6

the point on the graph is (- 2, 6)