Given a quadratic function, y = a x squared + b x + c, what happens to the graph when "a" is positive? a. the parabola opens down, the vertex is the maximum value c. the parabola opens up, the vertex is the maximum value b. the parabola opens down, the vertex is the minimum value d. the parabola opens up, the vertex is the minimum value Please select the best answer from the choices provided A B C D

In the image, point a marks the center of the circle. which two lengths must form a ratio of 1 : 2? (options are in the images since thought they were harmful phrases)

The equation of a circle is (x - 3)2 + (y - 7)2 = 25. determine the length of the radius. 4 25 12.5 5 write the standard equation of the circle with center (2, 3) and a diameter of 12. (x - 2)2 + (y - 3)2 = 36 (x + 2)2 + (y + 3)2 = 12 (x - 2)2 + (y - 3)2 = 6 (x - 3)2 + (y - 2)2 = 36 the equation of a circle is (x + 3)2 + (y + 7)2 = 25. where is (3, 4) located in relation to the circle? on the circle in the interior of the circle in the exterior of the circle at the center of the circle

Add the fractions and simplify 1/2+ 1/3