What is the vertex form of the parabola from Daredevil Danny’s practice jump?

Let the closed interval [a , b] be the domain of function f. the domain of f(x - 3) is given by (a) the open interval (a , b) (b) the closed interval [a , b] (c) the closed interval [a - 3 , b - 3] (d) the closed interval [a + 3 , b + 3]

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

Use the distributive law to multiply. 3(4x + 5y + 6)