find the required number TU=3 RS=15 TW=4 TR=9
WS=

Question

find the required number TU=3 RS=15 TW=4 TR=9
WS=

anonymous · Answer

Heres a photo for referecnce

kinggeorge · Answer

You know that TU=3, and TR=9 Can you tell me what RU is?

anonymous · Answer

actually i can't RU is also anotheer question i was gonna ask. but can you help me find both

kinggeorge · Answer

Sure. Look at your triangle. Notice that TR=TU+RU. You're given that TR=9, and TU=3. Do the substitutions, you get $$9=3+RU$$Can you solve for RU from there?

anonymous · Answer

kind of

kinggeorge · Answer

Why don't you give it a shot.

anonymous · Answer

ok would it be 27i
 tried to cross multiply

kinggeorge · Answer

Not quite. You don't want to cross multiply anything yet. 

You only need to subtract 3 from both sides.$$9=3+RU$$$$9-3=3-3+RU$$$$6=0+RU$$$$RU=6$$

kinggeorge · Answer

Now that we have RU, it's much easier to find WS. You're given $$\frac{TU}{UR}=\frac{TW}{WS}$$You are also given TU=9, TW=4, and we just found UR=6. Do the substitutions, we get $$\frac{9}{3}=\frac{4}{WS}$$Can you solve from here? (Hint: cross multiply)

anonymous · Answer

i got 1.3 repeating

kinggeorge · Answer

That looks perfect. Good job!

kinggeorge · Answer

Wait!

anonymous · Answer

what???

kinggeorge · Answer

I did some things wrong in my substitution :( Completely my fault. Hold on one second to let me correct everything.

kinggeorge · Answer

You are also given TU=3, TW=4, and we just found UR=6. Do the substitutions, we get $$\frac{3}{6}=\frac{4}{WS}$$Now can you solve this (cross multiply again).

Sorry about the confusion. That was completely my fault.

anonymous · Answer

its ok and thank you
btw do you know anything about algerbra and ratios

kinggeorge · Answer

I can handle my algebra and ratios.

anonymous · Answer

use the figure to find each ratio in the simplest form

kinggeorge · Answer

First off, can you tell me what AB is? 

Hint: $$AB=AD+DB$$

anonymous · Answer

18

kinggeorge · Answer

Right on. Now we're given that AD=12, and we've found AB=18. We're told to calculate $$\frac{AD}{AB}=\frac{12}{18}$$What is this in simplest form?

anonymous · Answer

6/9

kinggeorge · Answer

It can be reduced a little bit farther than that.

kinggeorge · Answer

Sorry, but I've got to go now. If you have more questions close this one and ask to the left. 

One final hint: The denominator will be 3.