see the attached figure to better understand the problem
we have that

Step 1
<u>Find the value of AC</u>
we know that
in the right triangle ABC

substitute the values in the formula

Step 2
<u>Find the value of BC</u>
we know that
in the right triangle ABC
Applying the Pythagorean Theorem

substitute the values

Step 3
<u>Find the value of BD</u>
we know that
in the right triangle BCD
Applying the Pythagorean Theorem

substitute the values


therefore
<u>the answer is</u>
the length of BD is 11.93 units
It is what it is, everything going okay?
I found this for you. It even tells you how the answer was achieved.
Answer:
y = 1/15
Step-by-step explanation:
3y + 1/5 = 2/5
Subtract 1/5 from each side
3y +1/5 -1/5 = 2/5 -1/5
3y = 1/5
Multiply by 1/3
3y *1/3 = 1/5 *1/3
y = 1/15