Consider the steps for solving 3x^2 - 42x +9=-5 for x by completing the square. Step 1: 3x^2-42x=-14 Step 2: 3(x^2-14x)=-14 Step 3: 3(x^2-14x+49=-14+_ What number should be added to the right side of the equation?​

Two groups of students were asked how many hours they spent reading each day. the table below shows the numbers for each group: group a 1 2 1 1 3 3 2 2 3 group b 3 2 3 2 2 2 1 1 2 based on the table, which of the following is true? the interquartile range for group a students is 0.5 less than the interquartile range for group b students. the interquartile range for group a students is equal to the interquartile range for group b students. the interquartile range for group a employees is 0.5 more than to the interquartile range for group b students. the interquartile range for group a employees is 1 more than the interquartile range for group b students.