ZA =30 + 2x and ZB=x. Then the measure of ZB

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Need this asap if anyone can i would be very grateful. if you could show workings that would really

Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9

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%