If y=-x2+14x+7, then x=10 is a counterexample for which conjecture? a. y is always positive. b. y is always negative. c. y is a function of x. d. the graph of y is a parabola.

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?