Select the correct answer which expression is in its simplest form?

Measures of the angle of r, 31 s (x+4) t (3x+9)

Will mark 50 show all what is the solution to the system of equations? use the substitution method and show your work. -5x+y= -3 -15 x+3y=7 explain what your answer in part (a) tells you about the association of the lines in this system.

Which angle has the same measure as the dehedral angle formed by the orange face and the purple rectangle