2a – 3c = –6

a + 2c = 11

(negative startfraction 76 over 7 endfraction, startfraction 17 over 7 endfraction)
(3, –4)
(3, 4)
(startfraction 87 over 7 endfraction, negative startfraction 5 over 7 endfraction)

Robert plans to make a box-and-whisker plot of the following set of data. 27, 14, 46, 38, 32, 18, 21 find the lower quartile, the median, and the upper quartile of the set? lower quartile: 19.5; median: 29.5; upper quartile: 42 lower quartile: 14; median: 27; upper quartile: 46 lower quartile: 18; median: 27; upper quartile: 38 lower quartile: 16; median: 29.5; upper quartile: 42