Rewrite the expression as a complex number in standard form a+bi

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0

Sue's average score for three bowling games was 162. in the second game, sue scored 10 less than in the first game. in the third game, she scored 13 less than in the second game. what was her score in the first game?