2- 4p ≥ -42 so i'm doing this in algebra and i need !

Vhich expression is equivalent to 6(3x + 4)? 9x + 418 x + 2418x + 49x + 10 i might ! i really do hope u see this and answer it

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

From the top of a tree a bird looks down on a field mouse at an angle of depression of 50°. if the field mouse is 40 meters from the base of the tree, find the vertical distance from the ground to the bird's eyes.