Plsss help me due in 10 minutes

3(10x-y)-5(x-y^2) need this solved asap

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]

Hi my sisters and brothers can tell me the answer because i don’t understand the question