Which of these is an example of typing an average rate of 42 words per minute

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

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%

Which of the following is the result of expanding the series