Shana and Bill are working together to solve the system by substitution. Shana wants to rewrite the first equation to solve for x. Bill wants to rewrite the second to solve for y. Who is correct? Why? x−2y+z=13−4x+y−2z=−302x+2y−z=2

If 1 is divided by the sum of y& 4. the result is equal to 3 divided by 4 .find the value of m?

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%

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?