Help with Algebra/Geometry hw?

Question

I need some help with some of my hw.... I'm not sure if its Algebra or Geometry cause I'm in Geometry but sense its the beg of the school yeah the review a little so I'm not sure.... but here's the questions i need help with...

Use the diagram for this problem (no diagram but ill explain what it looks like)

22. GH = 4x -1, and DH = 8. Find X

G,,,,,D,,,,,H (the , are just to keep GDH in the right spot)

*---I--------I--* the * is a point... the segment has G at the left then D at the midpoint. Then H on the right.... segment GD and DH are the same length.

32. Suppose S is between R and T. Use the segment Addition Postulate to solver for each variable.

RS = 3x + 1

ST = 1/2X +3

RT = 18

Then tell wether these statements are sometimes,always,or never true.

Two Segments that have the same length must be congruent.

If Y is between X and Z. then X, Y, and Z are collinear

those are it... thx for help and yes i will pick a best answer

Answer 1

22. since DH is 8 and GD is 8 then GH=16 so

4x-1=16

x=4.25

Two Segments that have the same length must be congruent.

always

If Y is between X and Z. then X, Y, and Z are collinear

always