Question

coordinate geometry help? :(
i drew it out snd put the problem here: http://i.imgur.com/JXzrW.png

Answer 1

in a rhombus:
1) all sides are equal :
8x-5 = 3x+30
5x=35
x=7
so SR=8x-5 = 51

2) diagonals bisect each other :
4z-8 = 3z
z=8
RT=2(ET) = 2(5z+5) = 2(40+5) = 90

3) diagonals are perpendicular:
9y+8 + 5y-2 = 90
14y = 84
y= 6
so <(TAS) = 9y+8 = 62

Answer 2

ohh! thank you, i get it :)