Can someone help me with this question? 4(3 − 1) − 10 = 8 + 10

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]

Yo need asap pls ! markin da brainiest too !

Can someone me find the original price? the discount is 5% and the sale price is $68.40