This data represents 12 scores on a math test : 1, 5, 9, 13, 14, 19, 19, 24, 26, 30, 31, 35 the cut-off for the lower quartile lies between which two scores

Quick translate "x is 12 units from 20" into an equation. what are the values of x being described? if you can answer any of my other questions that'd be great too

Which ordered pair (c, d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

The tile along the edge of a triangular community pool needs to be replaced? ?