A room contains 120 pillows. The number of pillows per row is 1 less than twice the number of rows. Find the number of rows and number of pillows per row.
+36916 NOW this question makes sense......we had it posted yesterday as 140 pillows.
Number of pillows per row = (2r-1) r = number of rows
total pillows = (2r-1)(r) = 120
2r^2-r-120 = 0 Use Quadratic Formula to find r = 8 ( and -7.5 which we will toss out)
Pillows per row = 2r-1 = 15 pillows/row 8 rows
+36916 NOW this question makes sense......we had it posted yesterday as 140 pillows.
Number of pillows per row = (2r-1) r = number of rows
total pillows = (2r-1)(r) = 120
2r^2-r-120 = 0 Use Quadratic Formula to find r = 8 ( and -7.5 which we will toss out)
Pillows per row = 2r-1 = 15 pillows/row 8 rows
