Pls pls pls helpp.

Let the closed interval [a , b] be the domain of function f. the domain of f(x - 3) is given by (a) the open interval (a , b) (b) the closed interval [a , b] (c) the closed interval [a - 3 , b - 3] (d) the closed interval [a + 3 , b + 3]

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab