Solve 6x^4-5x^2-4=0
Please include the steps so I can understand

The expression 42 plus 57 shows how much money nate spent at a store .which expression also shows how much money nate spend

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.

The figure below shows rectangle abcd and the triangle eca on a coordinate plane.which of the following expressions represents the perimeter of triangle of triangle eca in units