How do i solve 2x-y = -1 and 3x + y = 6 using substitution?

Multiply. write your answer in simplest form. 3/8 x 5/7

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%

Find the area of the triangle shown 3 by 6