second-period class average:
55+70+450+480+170+270+95 = 1590
1590/20 = 79.5
sixth-period class average:
65+225+480+595+270+190 = 1825
1825/20 = 91.25
on average, students in the sixth period class scored higher
The answer is 296,000,000.
3x-x=(2x+4)-(x+4)? That is my answer but it might not be right
