Solve the system of linear equations.
x+y+ z = 1
3x-y-7z = -33
-x-y- 5z = - 17

Answer these questions showing your work plz

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

Which expression gives you the distance between the points (5,1)and(9,-6)