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arlik [135]
3 years ago
10

If AD = y + 6 and DC = 2y, what is the length of DC? 12 -12 -15 15

Mathematics
2 answers:
babymother [125]3 years ago
5 0
Y+6=2y
-y=-6
y=6
The length of DC is 12
Ira Lisetskai [31]3 years ago
5 0

Answer:

DC=12\ units

Step-by-step explanation:

Step 1

<u>Find the value of y</u>

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


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