Explanation for Question 5 From the Math (Calc) Section on the 2018 March Sat
Question five says if the ratio of 0.5 over X 2 is equivalent to 1.5, over 2.25, 3 what is the value of X? So I'm going to set up these two 4 ratios. 0.5 over X is equal to 1.5 over 5 2.25. So the first thing we can do is cross multiply. 6 1.5 X is equal to 0.5 times 2.25, 7 and then we can divide both sides. By 1.5 to get X is equal 8 to 0.5 times 2.25 over 9 1.5. And that when you put it into the calculator is equal to 0.75. 10 So we know that the correct answer.