Please help

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

One side of a rectangle is 7 feet shorter than seven times the other side. find the length of the shorter side if we also know that the perimeter of the rectangle is 306 feet.

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}