Simplify: x^3÷x^5 a.) x^2 b.)x^8 c.)x^-8 or d.)x^-2

What are the solutions of the equation x4 + 6x2 + 5 = 0? use u substitution to solve.

What is 140 squared pleas me i am dumb

Right triangle abc has three sides with lengths ab= 119, bc = 169, ca= 120. find the value of cos c. hint: draw and label the triangle. the hypotenuse is always the longest.