Ineed this to be answered asap

Don't know how to find x given these segment lengths

Write the expression 7x^3-28xy^2 as the product of 3 factors

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? )