Please help! Solve this system by substitution, 50 points! -x -y -z = -8 -4x +4y +5z = 7 2x+2z=4 Show steps please!

Lorne subtracted 6x3 – 2x + 3 from –3x3 + 5x2 + 4x – 7. use the drop-down menus to identify the steps lorne used to find the difference.

While scuba diving, rajeev dove to a depth of 12.6 feet below the surface of the water and then descended another 8.7 feet. what expression can be used to find rajeev's new position? 12.6 – 8.7 –12.6 – 8.7 –12.6 – (–8.7) 12.6 – (–8.7)

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?