Which represents the polynomial written in standard form 8x2y2-3x3y/2+4x4-7xy3

Which statement best describes the polynomial

The means and mean absolute deviations of the individual times of members on two 4x400-meter relay track teams are shown in the table below. means and mean absolute deviations of individual times of members of 4x400-meter relay track teams team a team b mean 59.32 s 59.1 s mean absolute deviation 1.5 s 245 what percent of team b's mean absolute deviation is the difference in the means? 9% 15% 25% 65%

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827