What is the substitute of "x=y"?

Aregular hexagon rotates counterclockwise about its center. it turns through angles greater than 0° and less than or equal to 360°. at how many different angles will the hexagon map onto itself?

If x=-3 is the only x-intercept of the graph of a quadratic equation, which statement best discribes the discriminant of the equation?

Factor x2 – 8x + 15. which pair of numbers has a product of ac and a sum of what is the factored form of the