What is the equation you get whenever you combine the top 2 equations x + 4y – 3z = -7
2x – 4y + 4z = 2
-6x + 4y + 4z = -14

Plzzz helppp

Mindy bought 5/8 pound of almonds and a 3/4 pound of walnuts. which pair of fraction cannot be used to find how many pounds of nuts she bought in all.

What could explain what happened when the time was equal to 120 minutes

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=