OpenStudy (anonymous):

What is the value of x? 14 5 9 15

5 years ago
OpenStudy (anonymous):
5 years ago

OpenStudy (anonymous):

The little arrows mean that the horizontal lines are parallel. Do you know what that means for your problem?

5 years ago
OpenStudy (anonymous):

no :/

5 years ago
OpenStudy (anonymous):

It means that triangle ADF and triangle ABC are similar

5 years ago
OpenStudy (anonymous):

is it 15?

5 years ago
OpenStudy (anonymous):

That means that all the side lengths are in the same ratio, the bigger triangle is just some factor larger than the smaller one.

5 years ago
OpenStudy (anonymous):

So you can set up a ratio, like 5 is to 9 as (x-5) is to … ???

5 years ago
OpenStudy (anonymous):

i did 5/4 = x-5/8 cross multiply 40=4(x-5) 40=4x - 20 add 20 to both sides 60=4x 60/4 = 4X/4 x=15 am i correct?

5 years ago
OpenStudy (anonymous):

Yes! The top is correct, let me check the rest.

5 years ago
OpenStudy (anonymous):

Looks good!

5 years ago
OpenStudy (anonymous):

YAE.! =)

5 years ago