Can someone help me with both parts (a and b) ? thank u!!! Given the quadratic function f(x) = ax^2 +11x +12, where a is some real number constant.

Si la base de un triángulo isósceles mide 70 m y el ángulo opuesto a ésta mide 58°; entonces ¿cuánto mide la altura de dicho triángulo? a) 21.87 m. b) 40.01 m. c) 43.74 m. d) 63.14 m.

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)