Betty had $70. she bought a necklace for $9 and a ring for $7. which expression correctly shows the total money betty has left? a $70 − (−$9) + (−$7) b $70 + (−$9) + (−$7) c $70 − (−$9) − (−$7) d $70 + (−$9) − (−$7) a b c
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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.