Help pls I NEED HELPPP

The graph shows the function f(x) = (2.5)x was horizontally translated left by a value of h to get the function g(x) = (2.5)x–h.

Explain step-by-step how to simplify -5(2x – 3y + 6z – 10).

What number should be added to the expression x^2+3x+ in order to create a perfect square trinomial? 3/2 3 9/4 9