If T is the midpoint of SU what are ST, TU, and SU?

Question

S_________T_________U

     9x                6x+30

Answer 1

ST = TU             definition of midpoint

9x = 6x + 30

3x = 30             subtract 6x from both sides

x = 10               divide both sides by 3

 

ST = 9(10)

TU = 6(10) + 30

SU = ST + TU