Evaluate the piecewise at x=-4 and x=4

Ineed solving this problem h/8=-25 solve for h idk how to this can someone show me and also give an answer you

Which of the following represents the zeros of f(x) = 6x3 − 31x2 + 4x + 5? −5, one third , one half 5, − one third , one half 5, one third , − one half 5, one third , one half

Which equation expression the relationship between the number of boxes b and the number of cans c and the proportion is 48