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If AD = y + 6 and DC = 2y, what is the length of DC?

User Titas
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2 Answers

3 votes
We are given
AD = y + 6 and DC = 2y

From the figure, we have the equation
AD = DC
Substituting the given
y + 6 = 2y
Solving for y
y = 6

Subsituting the value of y in DC
DC = 2(6) = 12
User Magdmartin
by
9.2k points
4 votes

Answer:


DC=12\ units

Explanation:

Step 1

Find the value of y

In this problem we know that


AD=DC -----> equation A


ED=DB

see the attached figure to better understand the problem

so

we have


AD=y+6


DC=2y

substitute the values in the equation A


y+6=2y

solve for y


2y-y=6


y=6\ units

Step 2

Find the value of DC

we have that


DC=2y

substitute the value of y


DC=2(6)=12\ units

If AD = y + 6 and DC = 2y, what is the length of DC?-example-1
User John Meacham
by
8.0k points

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