Explanation for Question 8 From the Math (No Calc) Section on the 2019 March Sat
Question eight asks, which of the following is equivalent to the sum of three 2 X to the fourth plus two X cubed and four X, 3 the fourth plus seven execute. So all we have to do here is add 4 and subtract like terms. So I'm going to rewrite this as a longer equation. 5 So three X to the fourth plus four X 6 to the fourth, plus two X cubed plus 7 seven X cube. 8 And then all we need to do is add like terms three plus four 9 X to the fourth is equal to seven X to the fourth and 10 two X to the third plus seven extra third is equal to nine X 11 to the third. And that is your final answer. 12 And so D is the correct choice here.