Idon't not understand substation for this problem y=x+6 then y=2x-7

Find the value of the variable and the length of each secant segment

Zahra runs a 500-meter race at a constant speed. which graph shows her distance from the finish line during the race?

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