Given that 7a+14b−28c=−77, −3a−b+37c=63, and 2a+0b−26c=−42, solve the system of equations using gaussian elimination. state the solution as an ordered triple (a, b,c).

Alength on a map is 7.5 inches. thescale is 1 inch: 5 miles. what is theactual distance? a 1.5 miles c 12.5 milesb 2.5 miles d 37.5 miles

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%

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?