algebra, 2/28

a-c block:   1) pg. 259, #7-9, 11-19
                  2) pg. 244, #5-10, 13-16 (graph lines for 5-10,13-16)
                  3) study for Wed. quiz on 4.6

d-block:   1) pg. 282-284, # 15-17, 35-37, 46, 47
                2) study for Wed. quiz on 5.1,5.2