What proportion could be used to solve the question? what percent of 80 is 23?

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

What is 4(x2 – 3x) + 12x2 + x simplified? f 4x2–3x h 16x2–11x g13x2–2x i16x2–12x

The interior angles formed by the sides of a hexagon have measures that sum to 720°. what is the measure of angle a? enter your answer in the box. m∠a= °