Can you symplify 6 10/21

The parabola opens: y=√x-4 (principal square root) up down right left

What is the factored form of the following expressions? d^2 – 13d + 36

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )