PLS HELP ME ILL MARK BRAINLESS I PROMISE.

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles.

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

Create and solve a linear equation that represents the model, where squares and triangles are shown evenly balanced on a balance beam. assume the weight of a square is 1 unit and the weight of a triangle is unknown.