I only have a few mins, I need help with this.

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

An object is translated by (x + 4, y - 2). if one point in the image has the coordinates (5, -3), what would be the coordinates of its pre-image? (9, -5) (1, -5) (9, -1) (1, -1)

Grant simplified the expression 1.5(-3.2 + 2.5) his work is shown below explain the error in grants work