Given t is the midpoint su, srt=uvt. prove rt=vt

  a scalene triangle

Step-by-step explanation:

ASketch a scalene triangle and label the vertices A, B, and C. BUse a compass to find the midpoint of AB¯. Label the midpoint D. CUse a compass to find the midpoint of AC¯ . Label the midpoint E. DUse a straightedge to draw _ DE. DE _ is one of the midsegments of the triangle. E△Repeat the process to find the other two midsegments of ABC.

maybe - definition of supplementary angles. im not sure. sorry

step-by-step explanation:

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18