Which expressions are equivalent to 3x+3(x+y)3x+3(x+y)3, x, plus, 3, left parenthesis, x, plus, y, right parenthesis ? choose all answers that apply: choose all answers that apply: (choice a) a 6x+3y6x+3y6, x, plus, 3, y (choice b) b 3(x+x+y)3(x+x+y)3, left parenthesis, x, plus, x, plus, y, right parenthesis (choice c) c 3xy3xy

Item 1 which question could the expression 1000n answer? let n = the number of gallons of gas used. how many miles per gallon did the car get driving 1000 miles? let n = the number of grams of food needed for each dog. how many grams of food are needed to feed 1000 dogs? let n = the number of people at the show. how many empty seats were there at the show if there are 1000 seats at the theater? let n = the number of seats at the theater. how many empty seats will there by if 1000 people come to the show?