Plz help I will give brainiest

Heather is riding a quadratic function that represents a parabola that touches but does not cross the x-axis at x=-6

What else equals 42 and 30 for multiply

Which is a logical conclusion based on the given information? a. figure abcd is a rhombus by the definition of a rhombus. b. segment ac is congruent to segment dc by cpctc. c. angle acb is congruent to angle adc by the angle-side-angle theorem. d. triangle acd is congruent to triangle cab by the hypotenuse-leg theorem.