What is the maximum height of the apple equation which formula is -16x^2+56x+40

Find the value of p for which the polynomial 3x^3 -x^2 + px +1 is exactly divisible by x-1, hence factorise the polynomial

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?