find the range of possible values of x for WYXV. VW is 5.05. XV is 5.05. WY is 10.4 and YX is 2x-7.
I dont know where to begin :(

Question

find the range of possible values of x for WYXV. VW is 5.05. XV is 5.05. WY is 10.4 and YX is 2x-7. 
I dont know where to begin :(

danjs · Answer

draw a picture

anonymous · Answer

|dw:1421715473235:dw|

danjs · Answer

Find the length of VY by using law of cosines maybe

danjs · Answer

10.4^2 = 5.05^2 + [VY]^2 -2*5.05*[VY]*cos(92)

Or Law of Sines may be easier

sin(92)/10.4  =  sin(Y)/5.05 =   sin(W) / VY     

Find angle Y, then angle W = 180 - Y - 92

anonymous · Answer

I dont understand after I get the angle. Do I put it into an equation 5.05 + 2x-7 =180?

danjs · Answer

Find the Length of VY, then use law of cosines to find x, 

(2x-7)^2 = 5.05^2 + [VY]^2 - 2(5.05)*(VY)*cos(57)

danjs · Answer

Is that the topic you are studying now, law of sines/cosines?

anonymous · Answer

Not at all- we are studying area of similar figures theorems :(