How to factorize 5x^2-20y^2

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

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

Ialready asked this but i never got an answer. will give a high rating and perhaps brainliest. choose the linear inequality that describes the graph. the gray area represents the shaded region. y ≤ –4x – 2 y > –4x – 2 y ≥ –4x – 2 y < 4x – 2